TOREX XC6421 User Manual

■

■

A

■



)

XC6421 Series

300mA Small High Speed Dual LDO Regulator, Built-in Inrush Current Protection

■GENERAL DESCRIPTION

The XC6421 series is an ultra small CMOS dual LDO regulator, mounting 300mA 2-channel small high speed LDO.
The series features high accuracy, high ripple rejection and low dropout voltage.
The series is capable of high density board installation by the ultra small package of two low on-resistance regulators. Both
output accuracies are ±1% by laser trimming.

Each regulator can be turned off independently to be in stand-by mode by controlling EN pin.
In this state, the electric charge at the output capacitor (C
the V
The output stabilization capacitor (CL) is also compatible with low ESR ceramic capacitors.
The high level of output stability is maintained even during frequent load fluctuations, due to the excellent transient response
performance.

reaches junction temperature or limit current.
The two regulators are completely isolated so that a cross talk during load fluctuations is minimized



■TYPICAL APPLICATION CIRCUITS

voltage quickly returns to the VSS level.

OUT

Over current protection circuit and over heat protection circuit are mounted, these circuits start working when output current

PPLICATIONS

●Mobile phones

●Portable game consoles

●Portable multimedia player

●Digital still cameras, Camcorders

) is discharged via the internal auto-discharge switch, and as a result

L

FEATURES

Maximum Output Current : 300mA
Operating Voltage Range : 1.6V～5.5V
Output Voltages : 1.2V～3.6V (0.05V increments)
Output Accuracy

: ±1% (V

OUT

±20mV(V
Dropout Voltage :

210mV@I

Low Power Consumption : 90μA / ch (TYP.)
Stand-by Current : 0.1μA
Ripple Rejection : 75dB@1kHz
ON/OFF Control : Active High
CL Discharge
Protection Current Limit 450mA (TYP.)
Short Circuit 125mA (TYP.)
Inrush Current Protection
Thermal Shutdown
Low ESR Capacitor : 1.0μF Ceramic Capacitor
Operating Ambient Temperature

: -40℃ ～ +85℃

Package : USP-6C
Environmentally Friendly

: EU RoHS Compliant, Pb Free

TYPICAL PERFORMANCE
CHARACTERISTICS

XC6421(V

C

100

=1.8V)

OUT

=3.0V+0.5V

V

IN

=0.1μF(ceramic), CL=1.0μF(ceramic

IN

≧2.00V)

≦1.95V)

OUT

=300mA （V

OUT

, Ta=25℃

p- pAC

ETR0353-003

OUT

=3.0V）

80

60

40

Ripple Re jection : R R (dB)

20

0

0.1 1 10 100 1000

IOUT=0.1m A
IOUT=1mA
IOUT=30mA
IOUT=100mA

Ripple Frequ enc y : f (kHz)

1/24

XC6421 Series

■PIN CONFIGURATION

■PIN ASSIGNMENT








* The dissipation pad for the USP-6C package should be solder-plated in recommended mount pattern and metal masking to enhance
mounting strength and heat release. If the pad needs to be connected to other pins, it should be connected to the V

PIN NUMBER

USP-6C

1 EN2 ON/OFF Control 2

2 VIN Power Input

3 EN1 ON/OFF Control 1

4 VSS Ground

5 V

6 V

V

OUT2

V

OUT1

V

SS

PIN NAME FUNCTIONS

Output 1

OUT1

Output 2

OUT2

EN2

V

IN

EN1

(No. 4) pin.

SS

2/24

●

■PRODUCT CLASSIFICATION

Ordering Information

XC6421①②③④⑤⑥-⑦

DESIGNATOR ITEM SYMBOL DESCRIPTION

①

②

③④

⑤⑥-⑦



(*1)

The “-G” suffix indicates that the products are Halogen and Antimony free as well as being fully RoHS compliant.



DESIGNATOR ③④: Output Voltage

③④

(*1)

EN1: Active High , EN2: Active High

Basic Function A

Built-in Thermal Shutdown
Inrush Current Protection
V

: CL Discharge, V

OUT1

OUT2

: CL Discharge

Enable Pin B EN1: With Pull-down EN2: With Pull-down

Output Voltage

01〜

See the chart below

Package (Order Unit) ER-G USP-6C (3,000/Reel)

VR1(V) VR2(V)

③④

VR1(V) VR2(V)

XC6421

Series

01 1.20 1.20 34 2.80 3.00
02 1.20 1.50 35 2.80 3.30
03 1.20 2.50 36 1.20 3.60
04 1.20 2.85 37 3.60 1.20
05 1.20 3.00 38 1.20 2.80
06 1.20 3.30 39 3.30 2.00
07 1.50 1.50 40 3.00 3.30
08 1.50 1.80 41 3.30 3.30
09 1.50 2.50 42 1.30 1.50
10 1.50 2.85 43 2.60 2.80
11 1.50 3.00 44 3.10 3.30
12 1.50 3.30 45 1.50 2.60
13 1.80 1.80 46 2.60 3.30
14 1.80 2.50 47 3.40 3.40
15 2.85 2.85 48 2.85 2.60
16 1.80 2.85 49 3.30 1.80
17 1.80 3.00 50 1.80 1.20
18 3.00 1.80 51 3.10 3.10
19 1.80 3.30 52 1.50 3.10
20 2.50 2.50 53 3.30 2.80
21 2.50 2.80 54 3.00 2.80
22 2.50 2.85 55 3.30 3.00
23 3.30 1.50 56 3.60 3.60
24 2.50 3.00 57 3.30 3.10
25 2.50 3.30 58 3.10 3.00
26 2.85 3.00 59 3.10 2.90
27 2.85 3.30 60 3.10 2.50
28 3.00 3.00 61 3.00 2.90
29 1.20 1.80 62 3.00 2.50
30 1.30 2.80 63 1.80 1.90
31 1.50 2.80 64 1.80 1.85
32 1.80 2.80 65 1.70 1.70
33 2.80 2.80

*For other output voltage combinations, please contact your local Torex sales office or representative.

3/24

XC6421 Series

■BLOCK DIAGRAM

■ABSOLUTE MAXIMUM RATINGS

Output Voltage 1, Output Voltage2 V

EN1, EN2 Input Voltage V

Power Dissipation USP-6C Pd

Operating Ambient Temperature Topr -40～+85 ℃

(*1)

(*2)

4/24

Storage Temperature Tstg -55～+125 ℃

Pd > { (VIN-V

The power dissipation figure shown is PCB mounted. Please refer to page 22 for details.

* Diodes inside the circuits are ESD protection diodes and parasitic diodes.

PAR AMET ER SYMBOL RATINGS UNITS

Input Voltage VIN Vss-0.3～Vss +7.0 V

Output Current I

)×I

OUT1

OUT1

+ (VIN-V

OUT2

)×I

OUT2

OUT1+IOUT2

OUT1, VOUT2

EN1, VEN2

}

800

(*1)

mA

VSS-0.3～VIN+0.3≦Vss +7.0 V

V

-0.3～Vss +7.0 V

SS

120

1000 (PCB mounted)

(*2)

mW

■ELECTRICAL CHARACTERISTICS

●XC6421 Series

Regulator 1, Regulator 2

PAR AMET ER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS

V

OUT(T)

OUT(T)

(*3)

V

×1.01

OUT(T)

(*3)

V

+20mV

OUT(T)

Output Voltage V

OUT(E)

×0.99

ｰ

20mV

(*2)

V

(*2)

V

V

OUT(T)

OUT(T)

V

≧

2.0V, VEN=VIN, I

OUT

(*2)

V

＜

2.0V, VEN=VIN, I

OUT

OUT

OUT

=10mA

=10mA

XC6421

Series

Ta =2 5 ℃

CIRCUITS

(*2)

V ①

(*2)

V ①

Maximum Output Current I

Load Regulation ΔV

Dropout Voltage

(*4)

Vdif

OUTMAX

OUT

VEN=VIN, 0.1mA≦I

I

OUT

Supply Current ISS V

I

Stand-by Current

STB

V

EN=VIN

≦

OUT

=300mA, VEN=VIN

, I

V

EN=VSS

OUT

=0mA

EN=VIN

300mA

300 - - mA ①

- 25 45 mV ①
See the chart below mV ①

- 90 190

μA ②

0.01 0.1 μA ②

2.5V≦VIN≦5.5V,

≦2.0V）,

（V

OUT(T)

, I

Line Regulation

(ΔV

ΔV

/

OUT

・

V

)

IN

OUT

V

EN=VIN

V

+0.5V≦VIN≦5.5V,

OUT(T)

（V

OUT(T)

V

EN=VIN

=30mA

OUT

≧2.05V）,

, I

=30mA

OUT

- 0.02 0.1 %/V ①

Input Voltage VIN - 1.6 - 5.5 V ①

Output Voltage

Temperature

Characteristics

(ΔTa

ΔV

/

OUT

・

V

)

OUT

V

, I

EN=VIN

-40℃≦Ta ≦85℃

OUT

=10mA,

- ±100 - ppm /℃ ①

(R&D Value)

V

,

EN=VIN

Ripple Rejection Rate PSRR

Limit Current I

Short-Circuit Current I

EN”H”Level Voltage V

EN”L”Level Voltage V

EN”H”Level Current I

EN”L”Level Current I

CL Discharge Resistance R

Inrush Current

Thermal Shutdown Detect

Temperature

Thermal Shutdown

Release Temperature

Thermal Shutdown

Release Temperature

T

TSD－TTSR

LIM

SHORT

ENH

ENL

ENH

ENL

DCHG

-

I

RUSH

T

TSD

T

TSR

=｛V

V

IN

+1.0｝+0.5Vp-pAC

OUT(T)

I

=30mA, f=1kHz

OUT

V

EN=VIN

=VIN, V

V

EN

-

- 75 - dB ③

310 450

OUT=VSS

- 125 - mA ①

- mA ①

1.0 - 5.5 V ①

- 0 - 0.3

=5.5V 2.9 6.0 9.5

V

EN=VIN

V

EN=VSS

=5.5V, VEN =VSS,

V

IN

V

=2.0V

OUT

-0.1 - 0.1 μA ①

- 230 - Ω ①

- 150 - mA ①

Junction Temperature - 150 - ℃ ①

Junction Temperature - 125 - ℃ ①

Junction Temperature

- 25 - ℃

μA ①

V ①

①

NOTE:
Unless otherwise stated, {V

IN=VOUT(T)

+1.0V}

Each channel is measured when the other channel is turned off (V

（*1）V
(ie. The output voltage when “V
（*2）Characteristics of the actual V
（*3）V
（*4）Vdif＝{V

: Effective output voltage (see the voltage chart)

OUT(E)

: Nominal output voltage

OUT(T)

IN1－VOUT1

V

: A voltage equal to 98% of the output voltage whenever an amply stabilized {V

OUT1

V

: The input voltage when V

IN1

}

+1.0V” is provided at the VIN pin while maintaining a certain I

OUT(T)

by nominal output voltage is shown in the voltage chart.

OUT(E)

appears as input voltage is gradually decreased.

OUT1







EN=VSS

).

value.

OUT

+1.0V} is input with every I

OUT(T)

OUT

.

5/24

XC6421 Series

■OUTPUT VOLTAGE CHART


Regulator 1, Regulator 2

●Voltage chart





NOMINAL

OUTPUT

VOLTAE

(V)

V

OUT(T)

OUTPUT

VOLTAGE

(V)

V

Vdif V

OUT(E)

MIN. MAX. TYP.

DROPOUT

VOLTAGE

(mV)

MAX.

NOMINAL

OUTPUT

VOLTAE

(V)

V

OUT(T)

OUTPUT

VOLTAGE

(V)

Vdif

OUT(E)

MIN. MAX. TYP.

DROPOUT

VOLTAGE

Ta =2 5 ℃

(mV)

MAX.

1.200 1.1800 1.2200 2.500 2.4750 2.5250

1.250 1.2300 1.2700

1.300 1.2800 1.3200 2.600 2.5740 2.6260

1.350 1.3300 1.3700

1.400 1.3800 1.4200 2.700 2.6730 2.7270

1.450 1.4300 1.4700 2.750 2.7225 2.7775

1.500 1.4800 1.5200 2.800 2.7720 2.8280

1.550 1.5300 1.5700

1.600 1.5800 1.6200 2.900 2.8710 2.9290

1.650 1.6300 1.6700 2.950 2.9205 2.9795

1.700 1.6800 1.7200 3.000 2.9700 3.0300

1.750 1.7300 1.7700

1.800 1.7800 1.8200 3.100 3.0690 3.1310

1.850 1.8300 1.8700 3.150 3.1185 3.1815

1.900 1.8800 1.9200 3.200 3.1680 3.2320

1.950 1.9300 1.9700

2.000 1.9800 2.0200 3.300 3.2670 3.3330

2.050 2.0295 2.0705 3.350 3.3165 3.3835

580 680

2.550 2.5245 2.5755

515 610

2.650 2.6235 2.6765

460 550

2.850 2.8215 2.8785

380 450

3.050 3.0195 3.0805

330 390

3.250 3.2175 3.2825

240 290

210 260

6/24

2.100 2.0790 2.1210 3.400 3.3660 3.4340

2.150 2.1285 2.1715 3.450 3.4155 3.4845

2.200 2.1780 2.2220 3.500 3.4650 3.5350

2.250 2.2275 2.2725 3.550 3.5145 3.5855

2.300 2.2770 2.3230 3.600 3.5640 3.6360

2.350 2.3265 2.3735

2.400 2.3760 2.4240

2.450 2.4255 2.4745

295 350

XC6421

Series

■OPERATIONAL EXPLANATION




The voltage divided by resistors Rx1 & Rx2 is compared with the internal reference voltage by the error amplifier. The



P-channel MOSFET which is connected to the Output pin (V



voltage at the Output pin (V



circuit protection and thermal protection operate in relation to the level of output current and heat dissipation. Further, the IC’s



internal circuitry can be shutdown via the EN pin signal.



) is controlled and stabilized by a system of negative feedback. The current limit circuit, short

OUT


















EN1

V

IN

EN2

XC6421ABxxxxseries

In-Rush-

Current-

Prevent

In-Rush-

Current-

Prevent

TSD

ON/OFF

Control

ON/OFF

Control

Current

Limit

Current

Limit

<Low ESR Capacitor>

The XC6421 series needs an output capacitor (C

compensation, please place an output capacitor (C

) for phase compensation. In order to ensure the stable phase

L

) of 1.0μF or bigger at the V

L

a stable power input, please connect an input capacitor (C

<Current Limiter, Short-Circuit Protection>

The XC6421 series has current limiter and droop shape of fold-back circuit. When the load current reaches the current
limit, the droop current limiter circuit operates and the output voltage drops. When the output voltage dropped, the fold-back
circuit operates and the output current goes to decrease. The output current finally falls at the level of 125mA when the output
pin is short-circuited.

<EN Pin>

The IC's internal circuitry can be shutdown via the signal from the EN pin. In shutdown mode, the XC6421 series enables the
electric charge at the output capacitor (C
(V

) quickly returns to the ground pin (VSS) level.

OUT

) to be discharged via the internal auto-discharge switch, and as a result the output pin

L

On the other hand, the XC6421 series has a pull-down resistor at the EN pin inside, so that the EN pin input current flows.

If this EN pin voltage is set with the specified voltage range, the logic is fixed and the IC will operate normally. However, the
supply current may increase as a result of shoot-through current in the IC's internal circuitry when a medium voltage is input to
the EN pin.

) is then driven by the subsequent control signal. The output

OUT

V

1

OUT

C

FB

R11

+

Error
Amp

-

Voltage

Reference

+

Error
Amp

-

Voltage

Reference

) of 1.0μF between V

IN

R

1

DCHG

R12

V

SS

V

2

OUT

C

FB

R21

R

2

DCHG

R22

pin and VSS pin as close as possible. For

OUT

pin and VSS pin.

IN

7/24

XC6421 Series

■OPERATIONAL EXPLANATION (Continued)

<CL Auto-Discharge Function>

XC6421 series can quickly discharge the electric charge at the output capacitor (CL), when a low signal is
inputted to the EN pin, which enables a part of the IC circuit put into OFF state, via the N-channel transistor located
between the V

is 5.5V (TYP.) and V

V

IN

auto-discharge resistance and the output capacitance (C
resistance [R
N channel transistor is calculated by the following formulas.

V : Output voltage after discharge
V

: Output voltage

OUT(E)

t: Discharge time,

τ: R

DCHG×CL

CL：Output capacitance
R

DCHG：CL

auto-discharge resistance

<Thermal Shutdown>

When the junction temperature of the built-in driver transistor reaches the temperature limit, the thermal shutdown
circuit operates and the driver transistor will be set to OFF. The IC resumes its operation when the thermal
shutdown function is released and the IC’s operation is automatically restored because the junction temperature
drops to the level of the thermal shutdown release voltage.

<Inrush Current Protection>

The inrush current protection circuit is built in the XC6421 series.
When the IC starts to operate, the protection circuit limits the inrush current as 150mA (TYP.) from input pin (VIN) to
output pin (V

8/24

pin and the VSS pin (cf. BLOCK DIAGRAM). The C

OUT

] and an output capacitance (C

DCHG

for charging CL capacitor.

OUT)

is 2.0V (TYP.). Moreover, discharge time of the output capacitor (CL) is set by the CL

OUT

) as τ(τ= C

L

–t/

V = V

OUT(E)

x e

τ

, or t=τIn ( V

discharge resistance is set to 230Ω when

L

). By setting time constant of a CL auto-discharge

L

x R

L

), the output voltage after discharge via the

DCHG

/ V )

OUT(E)

XC6421

■NOTES ON USE

1． For temporary, transitional voltage drop or voltage rising phenomenon, the IC is liable to malfunction should the ratings

be exceeded.

2. Where wiring impedance is high, operations may become unstable due to the noise and/or phase lag depending on

output current. Please strengthen V

3. Please wire the input capacitor (C

4. Torex places an importance on improving our products and its reliability.



However, by any possibility, we would request user fail-safe design and post-aging treatment on system or equipment.




and VSS wiring in particular.

IN

) and the output capacitor (CL) as close to the IC as possible.

IN

Series

9/24

XC6421 Series

■TEST CIRCUITS

●Circuit ①

●Circuit ②







10/24

●Circuit ③

V

CIN =0.1uF
ceramic

(



V

IN

)

EN1

EN2

V

V

VSS

OUT1

OUT2

C

L=1uF

ceramic

(

CL=1uF
ceramic

(

I

OUT1

)

A

V

I

OUT2

A

V

)

■TYPICAL PERFORMANCE CHARACTERISTICS

(1)　OutputVoltage vs. OutputCurrent

XC6421

Series

1.4

XC6421(V

V

=2.2V, CIN=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

OUT

=1.2V)

1.2

(V)

1.0

OUT

0.8

0.6

Ta=85℃

Ta=25℃

Ta=-40℃

0.4

OutputVoltage : V

0.2

0.0
0 50 100 150 200 250 300 350 400 450 500

OUT

OUT

=1.8V)

(mA)

2.0

OutputCurrent : I

XC6421(V

V

=2.8V, CIN=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

1.8

1.6

(V)

1.4

OUT

1.2

1.0

0.8

Ta=85℃

Ta=25℃

Ta=-40℃

0.6

0.4

OutputVoltage : V

0.2

0.0

0 50 100 150 200 250 300 350 400 450 500

OutputCurrent : I

OUT

(mA)

XC6421(V

C

=1.2V)

OUT

=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

1.4

1.2

(V)

1.0

OUT

0.8

0.6

VIN=1.6V

VIN=2.2V

VIN=2.7V

VIN=5.5V

0.4

OutputVoltage : V

0.2

0.0
0 50 100 150 200 250 300 350 400 450 500

OUT

OUT

=1.8V)

(mA)

OutputCurrent : I

XC6421(V

C

=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

2.0

1.8

1.6

(V)

1.4

OUT

1.2

1.0

0.8

VIN=1.9V
VIN=2.3V
VIN=2.8V
VIN=3.3V
VIN=5.5V

0.6

0.4

OutputVoltage : V

0.2

0.0
0 50 100 150 200 250 300 350 400 450 500

OutputCurrent : I

OUT

(mA)

Ta=25℃

Ta=25℃

3.0

XC6421(V

V

=3.5V, CIN=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

OUT

=2.5V)

2.5

(V)

OUT

2.0

1.5

Ta=85℃

Ta=25℃

Ta=-40℃

1.0

OutputVoltage : V

0.5

0.0
0 50 100 150 200 250 300 350 400 450 500

OutputCurrent : I

OUT

(mA)

XC6421(V

3.0

C

2.5

(V)

OUT

2.0

1.5

VIN=2.6V
VIN=3V
VIN=3.5V
VIN=4V
VIN=5.5V

1.0

OutputVoltage : V

0.5

0.0
0 50 100 150 200 250 300 350 400 450 500

OutputCurrent : I

=2.5V)

OUT

=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

(mA)

OUT

Ta=25℃

11/24

XC6421 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(1)　OutputVoltage vs. OutputCurrent

4.0

XC6421(V

V

=4.6V, CIN=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

OUT

=3.6V)

3.6

3.2

(V)

OUT

2.8

2.4

2.0

Ta=85℃

Ta=25℃

Ta=-40℃

1.6

1.2

0.8

OutputVoltage : V

0.4

0.0
0 50 100 150 200 250 300 350 400 450 500

OutputCurrent : I

(2)　OutputVoltage vs. InputVoltage

(V)

OUT

XC6421(V

C

1.4

1.2

1.0

0.8

=1.2V)

OUT

=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

OUT

(mA)

Ta=25℃

XC6421(V

=3.6V)

OUT

C

=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

4.0

3.6

3.2

(V)

OUT

2.8

2.4

2.0

1.6

VIN=3.7V
VIN=4.1V
VIN=4.6V
VIN=5.1V
VIN=5.5V

1.2

0.8

OutputVoltage : V

0.4

0.0
0 50 100 150 200 250 300 350 400 450 500

OUT

OUT

=1.2V)

(mA)

OutputCurrent : I

XC6421(V

C

=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

1.30

1.25

(V)

OUT

1.20

Ta=25℃

Ta=25℃

0.6

IOUT=1mA

0.4

OutputVoltage : V

0.2

IOUT=10mA
IOUT=30mA
IOUT=100mA

0.0

0.0 1.0 2.0 3.0 4.0 5.0 6.0

OUT

IN

=1.8V)

(V)

(V)

OUT

2.0

1.5

InputVoltage : V

XC6421(V

C

=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

1.0

IOUT=1mA

0.5

OutputVoltage : V

IOUT=10mA
IOUT=30mA
IOUT=100mA

0.0

0.0 1.0 2.0 3.0 4.0 5.0 6.0
InputVoltage : V

(V)

IN

Ta=25℃

1.15

1.10

OutputVoltage : V

1.05

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

OUT

IN

=1.8V)

(V)

(V)

OUT

1.90

1.85

InputVoltage : V

XC6421(V

C

=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

1.80

1.75

1.70

OutputVoltage : V

1.65

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
InputVoltage : V

(V)

IN

IOUT=1mA
IOUT=10mA
IOUT=30mA
IOUT=100mA

Ta=25℃

IOUT=1mA
IOUT=10mA
IOUT=30mA
IOUT=100mA

12/24

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(2)　OutputVoltage vs. InputVoltage

XC6421

Series

XC6421(V

C

3.0

=2.5V)

OUT

=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

2.5

(V)

OUT

2.0

1.5

1.0

OutputVoltage : V

0.5

IOUT=1mA
IOUT=10mA
IOUT=30mA
IOUT=100mA

0.0

0.0 1.0 2.0 3.0 4.0 5.0 6.0

4.0

InputVoltage : V

XC6421(V

C

=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

OUT

IN

=3.6V)

(V)

3.5

(V)

3.0

OUT

2.5

2.0

1.5

1.0

OutputVoltage : V

0.5

IOUT=1mA
IOUT=10mA
IOUT=30mA
IOUT=100mA

0.0

0.0 1.0 2.0 3.0 4.0 5.0 6.0
InputVoltage : V

(V)

IN

Ta=25℃

Ta=25℃

(V)

OUT

XC6421(V

C

2.60

2.55

=2.5V)

OUT

=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

2.50

2.45

2.40

OutputVoltage : V

2.35

3.0 3.5 4.0 4.5 5.0 5.5

OUT

IN

=3.6V)

(V)

(V)

OUT

3.70

3.65

InputVoltage : V

XC6421(V

C

=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

3.60

3.55

3.50

OutputVoltage : V

3.45

4.0 4.5 5.0 5.5
InputVoltage : V

(V)

IN

Ta=25℃

IOUT=1mA
IOUT=10mA
IOUT=30mA
IOUT=100mA

Ta=25℃

IOUT=1mA
IOUT=10mA
IOUT=30mA
IOUT=100mA

(3)　DropoutVoltage vs. OutputCurrent

XC6421(V

C

=1.0μF(ceramic), CL=1.0μF(ceramic)

0.8

0.7

0.6

0.5

※ Below the minimum operating Voltage

0.4

0.3

0.2

Dropout Voltage : Vdif (V)

0.1

0.0
0 50 100 150 200 250 300

IN

OutputCurrent : I

OUT

=1.2V)

OUT

(mA)

Ta=85℃

Ta=25℃

Ta=-40℃

0.5

XC6421(V

C

IN

=1.8V)

OUT

=1.0μF(ceramic), CL=1.0μF(ceramic)

0.4

0.3

0.2

0.1

Dropout Voltage : Vdif (V)

0.0
0 50 100 150 200 250 300

OutputCurrent : I

OUT

(mA)

Ta=85℃

Ta=25℃

Ta=-40℃

13/24

XC6421 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(3)　DropoutVoltage vs. OutputCurrent

0.5

XC6421(V

C

IN

=2.5V)

OUT

=1.0μF(ceramic), CL=1.0μF(ceramic)

0.4

0.3

0.2

0.1

Dropout Voltage : Vdif (V)

0.0
0 50 100 150 200 250 300

OutputCurrent : I

(4)　SupplyCurrent vs. InputVoltage

XC6421(V

150

125

(μA)

100

SS

=1.2V)

OUT

C

=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

OUT

(mA)

Ta=85℃

Ta=25℃

Ta=-40℃

0.5

XC6421(V

C

IN

=3.6V)

OUT

=1.0μF(ceramic), CL=1.0μF(ceramic)

0.4

0.3

0.2

0.1

Dropout Voltage : Vdif (V)

0.0
0 50 100 150 200 250 300

OUT

OUT

=1.8V)

(mA)

150

OutputCurrent : I

XC6421(V

C

=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

125

(μA)

100

SS

Ta=85℃

Ta=25℃

Ta=-40℃

75

50

Ta=85℃

SupplyCurrent : I

25

Ta=25℃
Ta=-40℃

0

0123456

150

InputVoltage : V

XC6421(V

C

=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

OUT

IN

=2.5V)

(V)

125

(μA)

100

SS

75

50

Ta=85℃

SupplyCurrent : I

25

Ta=25℃
Ta=-40℃

0

0123456

InputVoltage : V

(V)

IN

75

50

SupplyCurrent : I

25

Ta=85℃
Ta=25℃
Ta=-40℃

0

0123456

OUT

IN

=3.6V)

(V)

150

InputVoltage : V

XC6421(V

C

=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

125

(μA)

100

SS

75

50

SupplyCurrent : I

25

Ta=85℃
Ta=25℃
Ta=-40℃

0

0123456

InputVoltage : V

IN

(V)

14/24

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(5)　OutputVoltage vs. AmbientTemperature

XC6421

Series

(V)

OUT

1.30

1.25

XC6421(V

V

=2.2V, CIN=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

OUT

=1.2V)

1.20

IOUT=1mA

1.15

OutputVoltage : V

IOUT=10mA
IOUT=30mA
IOUT=100mA

1.10

-50 -25 0 25 50 75 100
AmbientTemperature : Ta (℃)

(V)

OUT

2.60

2.55

XC6421(V

V

=3.5V, CIN=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

OUT

=2.5V)

(V)

OUT

1.90

1.85

XC6421(V

V

=2.8V, CIN=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

OUT

=1.8V)

1.80

IOUT=1mA

1.75

OutputVoltage : V

IOUT=10mA
IOUT=30mA
IOUT=100mA

1.70

-50 -25 0 25 50 75 100
AmbientTemperature : Ta (℃)

(V)

OUT

3.70

3.65

XC6421(V

V

=4.6V, CIN=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

OUT

=3.6V)

2.50

2.45

OutputVoltage : V

2.40

-50 -25 0 25 50 75 100
AmbientTemperature : Ta (℃)

IOUT=1mA
IOUT=10mA
IOUT=30mA
IOUT=100mA

3.60

IOUT=1mA

3.55

OutputVoltage : V

IOUT=10mA
IOUT=30mA
IOUT=100mA

3.50

-50 -25 0 25 50 75 100
AmbientTemperature : Ta (℃)

(6)　SupplyCurrent vs. AmbientTemperature (7)　EN Threshold Voltage vs. AmbientTemperature

XC6421

160

IN=VOUT

1.2

V

+1.0V, CIN=1.0μF(ceramic), CL=1.0μF(ceramic)

150

1.0

140
130

(μA)

SS

120
110
100

90
80

SupplyCurrent : I

70

VOUT=1.2V
VOUT=1.8V
VOUT=2.5V
VOUT=3.6V

60
50

-50 -25 0 25 50 75 100
AmbientTemperature : Ta (℃)

(V)

EN

0.8

0.6

0.4

0.2

EN Threshold Voltage : V

0.0

-50 -25 0 25 50 75 100
AmbientTemperature : Ta (℃)

XC6421

C

=1.0μF(ceramic), CL=1.0μF(ceramic)

IN

EN"H"LEVEL

EN"L"LEVEL

15/24

XC6421 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(8)　Rising Response Time

(V)

IN

Input Voltage : V

(V)

IN

3.0

2.0

1.0

0.0

-1.0

-2.0

-3.0

6.0

4.0

2.0

XC6421(V

C

=0.1μF(ceramic), CL=1.0μF(ceramic)

IN

=1.2V)

OUT

VIN=0V→2.2V, tr=5μS, Ta=25℃

Input Voltage

Output Voltage

IOUT=0.1mA
IOUT=1mA
IOUT=30mA
IOUT=100mA

Time (40μs/div)

XC6421(V

C

=0.1μF(ceramic), CL=1.0μF(ceramic)

IN

=2.5V)

OUT

VIN=0V→3.5V, tr=5μS, Ta=25℃

Input Voltage

3.0

2.5

2.0

1.5

1.0

0.5

0.0

6.0

5.0

4.0

(V)

OUT

Output Voltage : V

(V)

OUT

(V)

IN

Input Voltage : V

(V)

IN

3.0

2.0

1.0

0.0

-1.0

-2.0

-3.0

6.0

4.0

2.0

XC6421(V

C

=0.1μF(ceramic), CL=1.0μF(ceramic)

IN

=1.8V)

OUT

VIN=0V→2.8V, tr=5μS, Ta=25℃

Input Voltage

Output Voltage

IOUT=0.1mA
IOUT=1mA
IOUT=30mA
IOUT=100mA

Time (40μs/div)

XC6421(V

C

=0.1μF(ceramic), CL=1.0μF(ceramic)

IN

=3.6V)

OUT

VIN=0V→4.6V, tr=5μS, Ta=25℃

Input Voltage

Output Voltage

3.0

2.5

2.0

1.5

1.0

0.5

0.0

6.0

5.0

4.0

(V)

OUT

Output Voltage : V

(V)

OUT

0.0

Output Voltage

-2.0

Input Voltage : V

-4.0

-6.0
Time (40μs/div)

(9)　Input Transient Response

XC6421(V

V

=2.2V⇔3.2V, tr=tf=5μS, Ta=25℃

IN

C

=0.1μF(ceramic), CL=1.0μF(ceramic)

IN

Input Voltage

Output Voltage

Time (100μs/div)

(V)

IN

Input Voltage : V

4.2

3.2

2.2

1.2

0.2

-0.8

-1.8

OUT

=1.2V)

IOUT=0.1mA
IOUT=1mA
IOUT=30mA
IOUT=100mA

IOUT=0.1mA
IOUT=1mA
IOUT=30mA
IOUT=100mA

3.0

2.0

1.0

0.0

1.23

1.22

1.21

1.20

1.19

1.18

1.17

Output Voltage : V

(V)

OUT

Output Voltage : V

Input Voltage : V

(V)

IN

Input Voltage : V

-2.0

-4.0

-6.0

4.8

3.8

2.8

1.8

0.8

-0.2

-1.2

0.0

IOUT=0.1mA
IOUT=1mA
IOUT=30mA
IOUT=100mA

Time (40μs/div)

XC6421(V

V

=2.8V⇔3.8V, tr=tf=5μS, Ta=25℃

IN

C

=0.1μF(ceramic), CL=1.0μF(ceramic)

IN

OUT

Input Voltage

Output Voltage

=1.8V)

IOUT=0.1mA
IOUT=1mA
IOUT=30mA
IOUT=100mA

Time (100μs/div)

3.0

2.0

1.0

0.0

1.83

1.82

1.81

1.80

1.79

1.78

1.77

Output Voltage : V

(V)

OUT

Output Voltage : V

16/24

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(9)　Input Transient Response

XC6421

Series

5.5

XC6421(V

C

=0.1μF(ceramic), CL=1.0μF(ceramic)

IN

OUT

V

=3.5V⇔4.5V, tr=tf=5μS, Ta=25℃

IN

Input Voltage

4.5

(V)

IN

3.5

Output Voltage

2.5

1.5

Input Voltage : V

0.5

-0.5
Time (100μs/div)

(10)　Load Transient Response

(V)

OUT

1.30

1.25

1.20

XC6421(V

I

OUT

Output Voltage

OUT

=1mA⇔100mA, tr=tf=0.5μS, Ta=25℃

=2.2V, CIN=CL=1.0μF(ceramic)

V

IN

=2.5V)

IOUT=0.1mA
IOUT=1mA
IOUT=30mA
IOUT=100mA

=1.2V)

2.53

2.52

2.51

2.50

2.49

2.48

2.47

500

400

300

(V)

OUT

Output Voltage : V

(mA)

OUT

(V)

IN

Input Voltage : V

(V)

OUT

6.5

5.5

4.5

3.5

2.5

1.5

0.5

1.4

1.3

1.2

XC6421(V

=4.6V⇔5.5V, tr=tf=5μS, Ta=25℃

V

IN

=0.1μF(ceramic), CL=1.0μF(ceramic)

C

IN

Input Voltage

Output Voltage

OUT

=3.6V)

IOUT=0.1mA
IOUT=1mA
IOUT=30mA
IOUT=100mA

Time (100μs/div)

XC6421(V

=0.1mA⇔300mA, tr=tf=0.5μS, Ta=25℃

I

OUT

V

Output Voltage

=1.2V)

OUT

=2.2V, CIN=CL=1.0μF(ceramic)

IN

3.63

3.62

3.61

3.60

3.59

3.58

3.57

1500

1200

900

(V)

OUT

Output Voltage : V

(mA)

OUT

Output Voltage : V

(V)

OUT

Output Voltage : V

1.15

1.10

1.05

1.90

1.85

1.80

1.75

1.70

1.65

Output Current

Time (20μs/div)

XC6421(V

=1mA⇔100mA, tr=tf=0.5μS, Ta=25℃

I

OUT

Output Voltage

Output Current

=1.8V)

OUT

=2.8V, CIN=CL=1.0μF(ceramic)

V

IN

Time (20μs/div)

100mA

1mA

100mA

1mA

200

100

0

500

400

300

200

100

0

Output Current : I

(mA)

OUT

Output Current : I

Output Voltage : V

(V)

OUT

Output Voltage : V

1.1

1.0

0.9

2.0

1.9

1.8

1.7

1.6

1.5

Output Current

300mA

0.1mA

Time (100μs/div)

XC6421(V

I

=0.1mA⇔300mA, tr=tf=0.5μS, Ta=25℃

OUT

V

Output Voltage

Output Current

=1.8V)

OUT

=2.8V, CIN=CL=1.0μF(ceramic)

IN

300mA

0.1mA

Time (100μs/div)

600

300

0

1500

1200

900

600

300

0

Output Current : I

(mA)

OUT

Output Current : I

17/24

XC6421 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(10)　Load Transient Response

(V)

OUT

Output Voltage : V

(V)

OUT

2.60

2.55

2.50

2.45

2.40

2.35

3.70

3.65

3.60

XC6421(V

I

=1mA⇔100mA, tr=tf=0.5μS, Ta=25℃

OUT

V

Output Voltage

Output Current

=2.5V)

OUT

=3.5V, CIN=CL=1.0μF(ceramic)

IN

100mA

1mA

Time (20μs/div)

XC6421(V

I

=1mA⇔100mA, tr=tf=0.5μS, Ta=25℃

OUT

V

Output Voltage

=3.6V)

OUT

=4.6V, CIN=CL=1.0μF(ceramic)

IN

500

400

300

200

100

0

500

400

300

(mA)

OUT

Output Current : I

(mA)

OUT

(V)

OUT

Output Voltage : V

(V)

OUT

2.7

2.6

2.5

2.4

2.3

2.2

3.8

3.7

3.6

XC6421(V

I

=0.1mA⇔300mA, tr=tf=0.5μS, Ta=25℃

OUT

V

IN

Output Voltage

Output Current

=2.5V)

OUT

=3.5V, CIN=CL=1.0μF(ceramic)

300mA

0.1mA

Time (100μs/div)

XC6421(V

I

=0.1mA⇔300mA, tr=tf=0.5μS, Ta=25℃

OUT

V

IN

Output Voltage

=3.6V)

OUT

=4.6V, CIN=CL=1.0μF(ceramic)

1500

1200

900

600

300

0

1500

1200

900

(mA)

OUT

Output Current : I

(mA)

OUT

3.55

3.50

Output Voltage : V

3.45

(11)　EN Rising Respose Time

3.0

2.0

(V)

EN

1.0

0.0

-1.0

EN Input Voltage : V

-2.0

-3.0

Output Current

Time (20μs/div)

XC6421(V

=1.2V)

OUT

V

=0V→2.2V, tr=5μS, Ta=25℃

EN

=2.2V, CIN=CL=1.0μF(ceramic)

V

IN

EN Input Voltage

Output Voltage

Time (40μs/div)

100mA

1mA

IOUT=0.1mA
IOUT=1mA
IOUT=30mA
IOUT=100mA

200

100

0

3.0

2.5

2.0

1.5

1.0

0.5

0.0

Output Current : I

(V)

OUT

Output Voltage : V

Output Voltage : V

(V)

EN

EN Input Voltage : V

3.5

3.4

3.3

3.0

2.0

1.0

0.0

-1.0

-2.0

-3.0

Output Current

Time (100μs/div)

XC6421(V

V

EN

V

IN

EN Input Voltage

Output Voltage

Time (40μs/div)

300mA

0.1mA

=1.8V)

OUT

=0V→2.8V, tr=5μS, Ta=25℃

=2.8V, CIN=CL=1.0μF(ceramic)

IOUT=0.1mA
IOUT=1mA
IOUT=30mA
IOUT=100mA

600

300

0

3.0

2.5

2.0

1.5

1.0

0.5

0.0

Output Current : I

(V)

OUT

Output Voltage : V

18/24

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(11)　EN Rising Respose Time

XC6421

Series

XC6421(V

V

EN

V

6.0

IN

EN Input Voltage

4.0

(V)

EN

2.0

0.0

Output Voltage

-2.0

EN Input Voltage : V

-4.0

-6.0
Time (40μs/div)

(12)　Ripple Rejection Rate

XC6421(V

=0.1μF(ceramic), CL=1.0μF(ceramic)

C

100

80

IN

=2.5V)

OUT

=0V→3.5V, tr=5μS, Ta=25℃

=3.5V, CIN=CL=1.0μF(ceramic)

IOUT=0.1mA
IOUT=1mA
IOUT=30mA
IOUT=100mA

=1.2V)

OUT

V

=3.0V+0.5V

IN

p-pAC

, Ta=25℃

6.0

5.0

4.0

3.0

2.0

1.0

0.0

(V)

OUT

Output Voltage : V

(V)

EN

EN Input Voltage : V

6.0

4.0

2.0

0.0

-2.0

-4.0

-6.0

100

80

XC6421(V

=3.6V)

OUT

V

=0V→4.6V, tr=5μS, Ta=25℃

EN

=4.6V, CIN=CL=1.0μF(ceramic)

V

IN

EN Input Voltage

Output Voltage

IOUT=0.1mA
IOUT=1mA
IOUT=30mA
IOUT=100mA

Time (40μs/div)

XC6421(V

=0.1μF(ceramic), CL=1.0μF(ceramic)

C

IN

=1.8V)

OUT

V

=3.0V+0.5V

IN

p-pAC

, Ta=25℃

6.0

5.0

4.0

3.0

2.0

1.0

0.0

(V)

OUT

Output Voltage : V

60

40

20

Ripple Rejection : RR (dB)

IOUT=0.1mA
IOUT=1mA
IOUT=30mA
IOUT=100mA

0

0.1 1 10 100 1000
Ripple Frequency : f (kHz)

100

XC6421(V

=0.1μF(ceramic), CL=1.0μF(ceramic)

C

IN

=2.5V)

OUT

V

=3.5V+0.5V

IN

p-pAC

80

60

40

20

Ripple Rejection : RR (dB)

IOUT=0.1mA
IOUT=1mA
IOUT=30mA
IOUT=100mA

0

0.1 1 10 100 1000

Ripple Frequency : f (kHz)

, Ta=25℃

60

40

20

Ripple Rejection : RR (dB)

IOUT=0.1mA
IOUT=1mA
IOUT=30mA
IOUT=100mA

0

0.1 1 10 100 1000
Ripple Frequency : f (kHz)

100

XC6421(V

=0.1μF(ceramic), CL=1.0μF(ceramic)

C

IN

=3.6V)

OUT

V

=4.6V+0.5V

IN

p-pAC

80

60

40

20

Ripple Rejection : RR (dB)

IOUT=0.1mA
IOUT=1mA
IOUT=30mA
IOUT=100mA

0

0.1 1 10 100 1000
Ripple Frequency : f (kHz)

, Ta=25℃

19/24

XC6421 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(13)　Inrush Current Response

Voltage [V]

Voltage [V]

4.0

3.0

2.0

1.0

0.0

-1.0

-2.0

-3.0

-4.0

5.0

4.0

3.0

2.0

1.0

0.0

-1.0

-2.0

-3.0

-4.0

-5.0

XC6421(V

VIN=2.2V, tr=tf=5μS, Ta=25℃

=0V→VIN, CIN=CL=1.0μF(ceramic)

V

EN

EN Input Voltage

Rush Current

=1.2V)

OUT

Output Voltage

Time [10us/div]

XC6421(V

=0V→VIN, CIN=CL=1.0μF(ceramic)

V

EN

EN Input Voltage

Rush Current

=2.5V)

OUT

VIN=3.5V, tr=tf=5μS, Ta=25℃

Output Voltage

Time [20us/div]

400

350

300

250

200

150

100

50

0

500
450
400
350
300
250
200
150
100
50
0

[mA]

RUSH

Rush Current:I

[mA]

RUSH

Rush Current : I

Voltage [V]

Voltage [V]

-1.0

-2.0

-3.0

-4.0

-5.0

4.0

3.0

2.0

1.0

0.0

-1.0

-2.0

-3.0

-4.0

5.0

4.0

3.0

2.0

1.0

0.0

XC6421(V

=0V→VIN, CIN=CL=1.0μF(ceramic)

V

EN

EN Input Voltage

OUT

VIN=2.8V, tr=tf=5μS, Ta=25℃

Rush Current

Time [10us/div]

XC6421(V

V

EN

EN Input Voltage

=3.6V)

OUT

VIN=4.6V, tr=tf=5μS, Ta=25℃

=0V→VIN, CIN=CL=1.0μF(ceramic)

Output Voltage

Rush Current

Time [20us/div]

=1.8V)

Output Voltage

400

350

300

250

200

150

100

50

0

500
450
400
350
300
250
200
150
100
50
0

[mA]

RUSH

Rush Current : I

[mA]

RUSH

Rush Current : I

(14)　Cross Talk

I

=30mA, I

OUT1

1.90

(V)

1.85

OUT

1.80

1.75

1.70

Output Voltage(VR1)：V

1.65

20/24

XC6421(V

OUT2

=1.8V, V

OUT1

=1mA⇔150mA, tr=tf=0.5μS, Ta=25℃

=2.8V, CIN=CL1=CL2=1.0μF(ceramic)

V

IN

Output Voltage(VR1 : 30mA)

Output Current

（VR2 : 1mA⇔150mA)

Time [100us/div]

OUT2

=1.8V)

500

400

300

200

100

0

OUT

Output Current(VR2)：I

(mA)

(V)

OUT

(VR1)：V

Output Voltage

3.70

3.65

3.60

3.55

3.50

3.45

I

OUT1

XC6421(V

=30mA, I

=3.6V, V

OUT1

=1mA⇔150mA, tr=tf=0.5μS, Ta=25℃

OUT2

V

=4.6V, CIN=CL1=CL2=1.0μF(ceramic)

IN

Output Voltage(VR1 : 30mA)

Output Current

（VR2 : 1mA⇔150mA)

OUT2

=3.6V)

Time [100us/div]

500

400

300

200

100

0

(mA)

OUT

(VR2)：I

Output Current



■PACKAGING INFORMATION

●USP-6C

XC6421

Series

●USP-6CReference Pattern Layout

0.225

0.50.5

0.25

0.250.25

1.8

●USP-6CReference Metal Mask Design

0.225

0.50.5

0.6

0.25

0.250.25

1.2

1.4

21/24

XC6421 Series

■PACKAGING INFORMATION (Continued)

● USP-6C Power Dissipation

Power dissipation data for the USP-6C is shown in this page.

The value of power dissipation varies with the mount board conditions.

Please use this data as one of reference data taken in the described condition.

1. Measurement Condition (Reference data)

Condition: Mount on a board

Ambient: Natural convection

Soldering: Lead (Pb) free

Board: Dimensions 40 x 40 mm (1600 mm

Copper (Cu) traces occupy 50% of the board area

In top and back faces

Package heat-sink is tied to the copper traces

Material: Glass Epoxy (FR-4)

Thickness: 1.6 mm

Through-hole: 4 x 0.8 Diameter

2

in one side)

2. Power Dissipation vs. Ambient Temperature

Board Mount (Tj max = 125℃)

Ambient Temperature（℃） Power Dissipation Pd（mW） Thermal Resistance (℃/W)

25 1000

85 400

Pd-Ta特性グラフ

Pd vs. Ta

Evaluation Board (Unit: mm)

100.00

1200
1000

800
600
400
200

許容損失Pd（mW）

0

Power Dissipation: Pd (mW)

25 45 65 85 105 125

Ambient Temperature: Ta (℃)

周辺温度Ta（℃）

22/24

■MARKING RULE

●USP-6C
① represents product series

②③ represents output voltage

④⑤ represents production lot number

01 to 09, 0A to 0Z, 11 to 9Z, A1 to A9, AA to Z9, ZA to ZZ in order.
(G, I, J, O, Q, W excluded. No character inversion used.)

MARK PRODUCT SERIES

R XC6421******-G

ex.)

MARK

② ③

0 1 XC6421**01**-G

PRODUCT SERIES

XC6421

Series

USP-6C

1

2

3

①

④ ⑤

②

③

6

5

4

23/24

XC6421 Series

1. The products and product specifications contained herein are subject to change without

notice to improve performance characteristics. Consult us, or our representatives

before use, to confirm that the information in this datasheet is up to date.

2. We assume no responsibility for any infringement of patents, patent rights, or other

rights arising from the use of any information and circuitry in this datasheet.

3. Please ensure suitable shipping controls (including fail-safe designs and aging

protection) are in force for equipment employing products listed in this datasheet.

4. The products in this datasheet are not developed, designed, or approved for use with

such equipment whose failure of malfunction can be reasonably expected to directly

endanger the life of, or cause significant injury to, the user.

(e.g. Atomic energy; aerospace; transport; combustion and associated safety

equipment thereof.)

5. Please use the products listed in this datasheet within the specified ranges.

Should you wish to use the products under conditions exceeding the specifications,

please consult us or our representatives.

6. We assume no responsibility for damage or loss due to abnormal use.

7. All rights reserved. No part of this datasheet may be copied or reproduced without the

prior permission of TOREX SEMICONDUCTOR LTD.

24/24