TOREX XC6221 User Manual

XC6221 Series

ETR0328_014

■GENERAL DESCRIPTION

The XC6221 series is a high accuracy, low noise, high speed, low dropout CMOS regulator with high ripple rejection. The series
includes a reference voltage source, an error amplifier, a current limiter, and a phase compensation circuit.
The CE function enables the entire circuit to be in stand-by state by inputting low level signal. As for the XC6221B/D stand-by
mode, the electric charge at the output capacitor (C
the V
capacitors.
Output voltage is selectable in 0.05V increments within a range of 0.80V~5.00V, using the laser trimming technology set in
factory.
The current limiter's fold-back circuit also operates as a short circuit protection and an output current limiter at the output pin.
The series achieves a fast response with only 25μA of low power consumption. Also the series has low dropout voltage
characteristics, which is 80mV at I
With the use of small USP-4 and ultra small USPN-4 packages, a small footprint circuit can be designed.

■APPLICATIONS

●Cellular phones

●Cordless phones

●Wireless communication equipment

●Portable games

●Cameras, VCRs

pin quickly returns to the VSS level. The output stabilization capacitor (CL) is also compatible with low ESR ceramic

OUT

=100mA and V

OUT

●Portable AV equipment

●PDAs

■TYPICAL APPLICATION CIRCUIT

) will be discharged by the internal auto-discharge switch, and as a result

L

=3.0V.

OUT

■FEATURES

Maximum Output Current : 200mA <Up to 250mA (TYP.)>
Dropout Voltage : 80mV@ I

=100mA,V

OUT

OUT

Operating Voltage Range : 1.6V ~ 6.0V

: 0.80V~5.00V (0.05V increments)Output Voltage Range

Accuracy

Low Power Consumption
Stand-by Current

High Ripple Rejection
CE Function

2% (V

: +

+30mV (V
+1% (V

+20mV (V

>1.50V) (Standard)

OUT

≦

1.45V) (Standard)

OUT

>2.00V) (High Accuracy)

OUT

≦

1.95V) (High Accuracy)

OUT

: 25μA (TYP.)
: Less than 0.1μA
: 70dB @ 1kHz
: CE Active High
Standby current below 0.1μA

C

High-Speed Auto-Discharge

L

(XC6221B/D)
CE Pin internally pulled-down
(XC6221C/D)

Low ESR Capacitor : 1.0μF ceramic capacitor
Low Output Noise
Operating Ambient Temperature

: -40℃~+85℃

Packages : USP-4, SOT-25, SSOT-24
USPN-4
Environmentally Friendly

: EU RoHS Compliant, Pb Free

■ TYPICAL PERFORMANCE

CHARACTERISTICS

●Load Transient Response

XC6221x182

=2.8V , Tr=Tf=5μs

=1 .0μ F (ce ramic)

IN=CL

Output Voltage

Output Current

Time: (500μs/div)

300

250

200

150

100

50

0

(mA)

OUT

Output Current: I

1/28

(V)

OUT

Output Voltage: V

1.9

1.8

1.7

1.6

1.5

1.4

1.3

V

IN=VCE

Ta=2 5℃ , C

100mA

10mA

=3.0V

(

)

(

(

(

XC6221 Series

■PIN CONFIGURATION

VSS2

V

1

OUT

■PIN ASSIGNMENT

BOTTOM VIEW)

2

V

SS

V

1

OUT

USPN-4

BOTTOM VIEW)

USP-4 SOT-25

3 CE

4 V

USP-4

PIN NUMBER

IN

3 CE

4 V

IN

*It is recommended that the heat dissipation pad of the USP-4

package is soldered by using the reference mount pattern and

metal mask pattern for mounting strength. The mount pattern

should be electrically opened or connected to the V

pin.

SSOT-24

V

OUT

5 4

1

V

USPN-4

IN

TOP VIEW

V

SOT-25

NC

V

IN

4

2

3

1

CE

CE

SS

SSOT-24

TOP VIEW)

(No.2)

SS

PIN NAME FUNCTIONS

V

OUT

3

2

V

SS

4

1

1 4

5 3

4 VIN Power Input

1 V

2 2 2 2 VSS Ground

3

3 1

3 CE ON/OFF Control

- 4 - - NC No Connection

■CE PIN LOGIC CONDITION

PIN NAME DESIGNATOR CONDITIONS

CE

* VCE ： CE pin voltage

H 1.2V≦VCE≦6.0V

L V

2/28

Output

OUT

≦0.3V

CE

■PIN FUNCTION ASSIGNMENT

XC6221A/B (CE no pull-down resistor)

CE LEVEL IC OPERATION

HIGH ON

LOW OFF

OPEN Undefined state

XC6221C/D (CE pull-down resistor)

CE LEVEL IC OPERATION

HIGH ON
LOW

OPEN

■PRODUCT CLASSIFICATION

●Ordering Information

XC6221 ①②③④⑤⑥-⑦

(*1)

OFF

DESIGNATOR ITEM SYMBOL DESCRIPTION

XC6221

Series

A No CE pull-down resistor without CL auto discharge

B No CE pull-down resistor with CL auto discharge

① Type of Regulator

C CE pull-down resistor without CL auto discharge

D CE pull-down resistor with C

②③ Output Voltage 08 ~ 50 ex.) V

+30mV @ 0.80V≦V

2

When 0.1V steps such as V
+

2% @ V

= 3.00V → ② = 3, ③ = 0

OUT

OUT

>1.50V

OUT

When 0.1V steps such as V

④ Output Accuracy

A

+30mV @ 0.85V≦V

When 0.05V steps such as V
+

2% @ V

OUT

>1.55V

When 0.05V steps such as V
+20mV @ 0.80V≦V

1

When 0.1V steps such as V

1% @ V

+

OUT

>2.00V

OUT

OUT

When 0.1V steps such as V

B

+20mV @ 0.85V≦V
When 0.05V steps such as V
+

1% @ V

OUT

>2.00V

OUT

When 0.05V steps such as V

GR

GR-G

MR

⑤⑥-⑦

(*1)

Packages

(Order Unit)

MR-G

NR

NR-G

7R-G

(*1)

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

(*2)

The range of the output voltage of USPN-4 package is 1.20V≦V

USP-4 (3,000/Reel)

USP-4 (3,000/Reel)

SOT-25 (3,000/Reel)

SOT-25 (3,000/Reel)

SSOT-24 (3,000/Reel)

SSOT-24 (3,000/Reel)

USPN-4 (5,000/Reel)

≦5.00V.

OUT

auto discharge

L

≦1.40V

=0.80V → ②=0, ③=8, ④=2

OUT

=3.00V → ②=3, ③=0, ④=2

OUT

≦1.45V

=0.85V → ②=0, ③=8, ④=A

OUT

=3.05V → ②=3, ③=0, ④=A

OUT

≦1.90V

=0.80V → ②=0, ③=8, ④=1

OUT

= 3.00V → ②=3, ③=0, ④=1

OUT

≦1.95V

=0.85V → ②=0, ③=8, ④=B

OUT

= 3.05V → ②=3, ③=0, ④=B

OUT

3/28

XC6221 Series

■BLOCK DIAGRAMS

CE V

ON/OFF

Control

CE CE/

each

circuit

CE V

IN

-

Error
Amp

+

Current

Limit

V

OUT

R1

Voltage

Reference

R2

V

SS

●XC6221A Series ●XC6221B Series

XC6221Aｼﾘｰｽﾞ

CE V

R Pull

-down

ON/OFF

Control

CE CE/

each

circuit

CE VIN

IN

-

Error
Amp

+

Current

Limit

V

OUT

R1

Voltage

Reference

R2

V

SS

●XC6221C Series ●XC6221D Series

XC6221Cｼﾘｰｽﾞ

*Diodes inside the circuit are an ESD protection diode and a parasitic diode.

■ABSOLUTE MAXIMUM RATINGS

PAR AMET ER SYMBOL RATINGS UNITS

Input Voltage VIN V

Output Current I

Output Voltage V

CE Input Voltage VCE V

Power Dissipation

USP-4

SOT-25

SSOT-24

USPN-4

400

OUT

V

OUT

Pd

-0.3 ~ +6.5 V

SS

– 0.3 ~ V

SS

– 0.3 ~ +6.5 V

SS

1000(PCB mounted)

600(PCB mounted)

500(PCB mounted)

600(PCB mounted)

Operating Ambient Temperature Topr - 40 ~ + 85 ℃

Storage Temperature Tstg - 55 ~ +125 ℃

4/28

*1 I

OUT

≦Pd / (VIN-V

OUT

)

*2 These values are example data which is taken with the PCB mounted. Please refer to pages 21 to 24 for details.

ON/OFF

Control

-

CE CE/

each

circuit

Voltage

Reference

Error
Amp

+

Current

Limit

XC6221Bｼﾘｰｽﾞ

ON/OFF

Control

R Pull

-down

CE CE/

each

circuit

Voltage

Reference

-

Error
Amp

+

Current

Limit

XC6221Dｼﾘｰｽﾞ

Ta =2 5℃

(*1)

mA

+ 0.3 V

IN

120

(*2)

250

(*2)

150

100

(*2)

(*2)

mW

IN

V

OUT

R1

Rdischg

CE/

R2

V

SS

V

OUT

R1

Rdischg

CE/

R2

V

SS

■ELECTRICAL CHARACTERISTICS

●XC6221A/B/C/D series

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

Output Voltage

(Standard)

Output Voltage

(High Accuracy)

Output Current I

Load Regulation V

Dropout Voltage

(*5)

Vdif VCE=V

1.50V<V

V

OUT(E)

(* 2)

V

2.00V<V

V

OUT(E)

(* 2)

V

OUTMAX

VCE=VIN,0.1mA≦I

OUT

OUT(T), VCE=VIN

<1.45V, VCE=VIN, I

OUT(T)

OUT(T)

<1.95V, VCE=VIN, I

OUT(T)

V

CE=VIN,VIN=VOUT(T)

0.80V<V

OUT(T)

(*4)

OUT(T)

(*4)

x 1.02

x 1.01

(*3)

+0.03

(*3)

(*3)

+0.02

(*3)

, I

=10mA

OUT

=10mA

OUT

, VCE=VIN, I

OUT

OUT

=10mA

=10mA

+1.0V,

<5.00V

OUT(T)

≦100mA - 10 40 mV ①

OUT

=100mA Refer to the voltage chart mV ①

IN, IOUT

x 0.98

(*3)

V

-0.03

(*3)

x 0.99

(*3)

V

-0.02

(*3)

200 250 - mA ①

XC6221

Series

Ta =2 5℃

V ①

V ①

Supply Current IDD V

Standby Current I

V

STB

V

/

Line Regulation

(VIN･

OUT

V

OUT

)

CE=VIN、VIN

V

1.10V≦V

V

OUT(T)

OUT(T)

OUT(T), VCE=VIN

1.6V≦VIN≦6.0V

≦1.05V, VCE=V

= V

6.0V, VCE=VSS - 0.01 0.10 μA ②

IN=

+1.0V - 25 50 μA ②

OUT(T)

+0.5V≦VIN≦6.0V

, I

=10mA

OUT

IN, IOUT

=10mA

- 0.01 0.20 %/V ①

Input Voltage VIN 1.6 - 6.0 V ①

/

V

Output Voltage

Temperature Characteristics

OUT

(To pr･V

OUT

)

VCE=V

I

=30mA, -40℃<Topr<85℃

OUT

IN,

- ±100 - ppm/℃ ①

VIN=5.75VDC+0.5Vp-pAC

4.75V≦V

V

VIN=｛V

Ripple Rejection Rate PSRR

V

VIN=｛V

V

V

Limit Current I

Short Current I

CE High Level Voltage V

CE Low Level Voltage V

CE High Level Current I

CE Low Level Current I

CL Auto-Discharge Resistance

NOTE:

* 1: Unless otherwise stated regarding input voltage conditions, V
* 2: V

(The output voltage when an amply stabilized "V

* 3: The relation between V

* 4: V
* 5: Vdif = {V
* 6: V
* 7: V
* 8: For the XC6221B/D series only. The XC6221A/C series discharges by resistors R1 and R2 only as shown in the block diagrams.
* 9: For operating supply current of the XC6221C/D, a current through the pull-down resistor should be considered in addition to the

(* 8)

= Effective output voltage

OUT (E)

and V

OUT1

(*6)

OU T (E)

}

= Nominal output voltage

OUT (T)

OUT1

IN1

(*7)

-V

IN1

is the voltage equal to 98% of the normal output voltage when amply stabilized V

is the input voltage when V

supply current value mentioned above.

V

LIM

V

SHORT

1.2 - 6.0 V ④

CEH

- - 0.3 V ④

CEL

CEH

V

CEL

R

V

DCHG

OUT (T)

appears at the V

OUT1

CE=VIN, VOUT

OUT (T)

is shown in the voltage chart E-0 and E-1.

, I

CE=VIN

OUT(T)

4.05V≦V

CE=VIN

OUT(T)

0.85V≦V

CE=VIN

=1.85VDC+0.5Vp-pAC

V

IN

CE=VIN

=30mA, f=1kHz

OUT

+1.0｝VDC+0.5Vp-pAC

OUT(T)

, I

=30mA, f=1kHz

OUT

+1.0｝VDC+0.5Vp-pAC

OUT(T)

, I

=30mA, f=1kHz

OUT

V

=0.80V

OUT(T)

, I

=30mA, f=1kHz

OUT

CE=VIN

is short-circuited at

the V

SS

VCE=VIN (XC6221A/B) -0.1 - 0.1

=6.0V (XC6221C/D) 1.03 - 2.37

V

CE

CE=VSS

=6.0V, V

IN

OUT

OUT

IN=VOUT(T)

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

pin while input voltage is gradually decreased.

OUT(T)

60

≦4.70V

-

- dB ③

≦4.00V

70

200 250 - mA ①

level

- 30 - mA ①

μA ④

-0.1 - 0.1 μA ④

=4.0V, VCE=VSS - 780 - Ω ①

＋1.0V.

value.)

OUT

+1.0V are input at the VIN pin.

OUT (T)

5/28

XC6221 Series

■OUTPUT VOLTAGE CHART

NOMINAL

OUTPUT

VOLTAGE

(V)

OUTPUT VOLTAGE

(Standard)

V

OUT(E)

(V)

OUTPUT VOLTAGE

(High Accuracy)

V

OUT(E)

(V)

MIN. MAX. MIN. MAX. TYP. MAX.

0.80 0.7700 0.8300 0.7800 0.8200

0.85 0.8200 0.8800 0.8300 0.8700

0.90 0.8700 0.9300 0.8800 0.9200

0.95 0.9200 0.9800 0.9300 0.9700

1.00 0.9700 1.0300 0.9800 1.0200

1.05 1.0200 1.0800 1.0300 1.0700

1.10 1.0700 1.1300 1.0800 1.1200

1.15 1.1200 1.1800 1.1300 1.1700

1.20 1.1700 1.2300 1.1800 1.2200

1.25 1.2200 1.2800 1.2300 1.2700

1.30 1.2700 1.3300 1.2800 1.3200

1.35 1.3200 1.3800 1.3300 1.3700

1.40 1.3700 1.4300 1.3800 1.4200

1.45 1.4200 1.4800 1.4300 1.4700

1.50 1.4700 1.5300 1.4800 1.5200

1.55 1.5200 1.5800 1.5300 1.5700

1.60 1.5700 1.6300 1.5800 1.6200

1.65 1.6200 1.6800 1.6300 1.6700

1.70 1.6700 1.7300 1.6800 1.7200

1.75 1.7200 1.7800 1.7300 1.770

1.80 1.7700 1.8300 1.7800 1.8200

1.85 1.8200 1.8800 1.8300 1.8700

1.90 1.8700 1.9300 1.8800 1.9200

1.95 1.9200 1.9800 1.9300 1.9700

2.00 1.9600 2.0400 1.9800 2.0200

2.05 2.0090 2.0910 2.0295 2.0705

2.10 2.0850 2.1420 2.0790 2.1210

2.15 2.1070 2.1930 2.1285 2.1715

2.20 2.1560 2.2440 2.1780 2.2220

2.25 2.2050 2.2950 2.2275 2.2725

2.30 2.2540 2.3460 2.2770 2.3230

2.35 2.3030 2.3970 2.3265 2.3735

2.40 2.3520 2.4480 2.3760 2.4240

2.45 2.4010 2.4990 2.4255 2.4745

2.50 2.4500 2.5500 2.4750 2.5250

2.55 2.4990 2.6010 2.5245 2.5755

2.60 2.5480 2.6520 2.5740 2.6260

2.65 2.5970 2.7030 2.6235 2.6765

2.70 2.6460 2.7540 2.6730 2.7270

2.75 2.6950 2.8050 2.7225 2.7775

2.80 2.7440 2.8560 2.7720 2.8280

2.85 2.7930 2.9070 2.8215 2.8785

2.90 2.8420 2.9580 2.8710 2.9290

2.95 2.8910 3.0090 2.9205 2.9795

＊The range of the output voltage of USPN-4 package is 1.20V≦V

OUT(T)

≦5.00V.

DROPOUT VOLTAGE

Vdif

(mV)

500 850

410 750

330 650

230 410

200 360

180 290

160 250

125 210

115 195

95 170

6/28

■OUTPUT VOLTAGE CHART (Continued)

XC6221

Series

NOMINAL

OUTPUT

VOLTAGE

(V)

OUTPUT VOLTAGE

(Standard)

V

OUT(E)

(V)

OUTPUT VOLTAGE

(High Accuracy)

V

OUT(E)

(V)

MIN. MAX. MIN. MAX. TYP. MAX.

3.00 2.9400 3.0600 2.9700 3.0300

3.05 2.8990 3.1100 3.0195 3.0805

3.10 3.0380 3.1620 3.0690 3.1310

3.15 3.0870 3.2130 3.1185 3.1815

3.20 3.1360 3.2640 3.1680 3.2320

3.25 3.1850 3.3150 3.2175 3.2825

3.30 3.2340 3.3660 3.2670 3.3330

3.35 3.2830 3.4170 3.3165 3.3835

3.40 3.3320 3.4680 3.3660 3.4340

3.45 3.3810 3.5190 3.4155 3.4845

3.50 3.4300 3.5700 3.4650 3.5350

3.55 3.4790 3.6210 3.5145 3.5855

3.60 3.5280 3.6720 3.5640 3.6360

3.65 3.5770 3.7230 3.6135 3.6855

3.70 3.6260 3.7740 3.6630 3.7370

3.75 3.6750 3.8250 3.7125 3.7875

3.80 3.7240 3.8760 3.7620 3.8380

3.85 3.7730 3.9270 3.8115 3.8885

3.90 3.8220 3.9780 3.8610 3.9390

3.95 3.8710 4.0290 3.9105 3.9895

4.00 3.9200 4.0800 3.9600 4.0400

4.05 3.9690 4.1310 4.0095 4.0905

4.10 4.0180 4.1820 4.0590 4.1410

4.15 4.0670 4.2330 4.1085 4.1915

4.20 4.1160 4.2840 4.1580 4.2420

4.25 4.1650 4.3350 4.2075 4.2925

4.30 4.2140 4.3860 4.2570 4.3430

4.35 4.2630 4.4370 4.3065 4.3935

4.40 4.3120 4.4880 4.3560 4.4440

4.45 4.3610 4.5390 4.4055 4.4945

4.50 4.4100 4.5900 4.4550 4.5450

4.55 4.4590 4.6410 4.5045 4.5955

4.60 4.5080 4.6920 4.5540 4.6460

4.65 4.5570 4.7430 4.6035 4.6965

4.70 4.6060 4.7940 4.6530 4.7470

4.75 4.6550 4.8450 4.7025 4.7975

4.80 4.7040 4.8960 4.7520 4.8480

4.85 4.7530 4.9470 4.8015 4.8985

4.90 4.8020 4.9980 4.8510 4.9490

4.95 4.8510 5.0490 4.9005 4.9995

5.00 4.9000 5.1000 4.9500 5.0500

DROPOUT VOLTAGE

Vdif

(mV)

80 140

7/28

XC6221 Series

■OPERATIONAL EXPLANATION

<Output Voltage Control>

The voltage divided by resistors R1 & R2 is compared with the internal reference voltage by the error amplifier. The
P-channel MOSFET connected to the V
V

pin is controlled & stabilized by a system of negative feedback. The current limit circuit and short protect circuit

OUT

operate in relation to the level of output current. Further, the IC's internal circuitry can be shutdown via the CE pin's signal.

CE V

ON/OFF

Control

CE CE/

each

circuit

-

Error
Amp

+

Current

Limit

Voltage

Reference

<Input and Output Capacitors>

The XC6221 needs an output capacitor C
shown in the chart below. If a loss of the capacitance happens, the stable phase compensation may not be obtained.
Please ensure to use a capacitor which does not depend on bias or temperature too much. For a stable power input,
please connect an input capacitor C

of 1.0μF between the VIN pin and the VSS pin.

IN

●Except USPN-4
OUTPUT VOLTAGE (V) OUTPUT CAPACITOR VALUE

0.80V～1.15V CL ≧4.7μF

1.20V～1.35V CL ≧2.2μF

1.40V～4.00V CL ≧1.0μF

4.05V～5.00V CL ≧2.2μF

●USPN-4
OUTPUT VOLTAGE (V) OUTPUT CAPACITOR VALUE

1.20V～4.00V CL ≧2.2μF

4.05V～5.00V CL ≧4.7μF

<C

Auto-Discharge Function>

L

XC6221B/D series can discharge the electric charge in the output capacitor (CL), when a low signal to the CE pin, which
enables the whole IC circuit to be turned off, is inputted via the N-channel transistor and C
(R

) located between the V

DCHG

value is set at 780Ω(V
auto-discharge resistance (R
resistance value [R
the N-channel transistor is calculated by the following formula.

V = V

OUT(E)

x e

where

V : Output voltage after discharge

V

: Output voltage

OUT (E)

t : Discharge time

τ: CL auto-discharge resistance R

=4.0V @ VIN=6.0V at typical). The discharge time of the output capacitor (CL) is set by the C

OUT

] and the output capacitor value (CL) as τ(τ=CL x R

DCHG

–t/

τ

, or t=τIn ( V / V

pin and the VSS pin (cf. BLOCK DIAGRAM). The CL auto-discharge resistance (R

OUT

) and the output capacitor (CL). By setting the time constant of the CL auto-discharge

DCHG

DCHG

8/28

pin, is then driven by the subsequent output signal. The output voltage at the

OUT

IN

OUT

V

R1

Rdischg

CE/

R2

SS

V

for phase compensation. Values required for the phase compensation are

L

auto-discharge resistance

L

), the output voltage after discharge via

DCHG

)

OUT(E)

×Output capacitor value CL

DCHG

)

L

■OPERATIONAL EXPLANATION (Continued)

<Current Limiter, Short-Circuit Protection>

The XC6221 series’ fold-back circuit operates as an output current limiter and a short protection circuit for the output pin.
When the load current reaches the current limit level, the fixed current limiter circuit operates and output voltage drops.
When the output pin is short-circuited to the V

<CE Pin>

The XC6221 internal circuitry can be shutdown via the CE pin signal. In shutdown mode, output at the V
pulled down to the V
connected in parallel to R1 and R2 while the power supply is applied to the V
reaches the V
open. For the XC6221C/D, the output voltage becomes V
internal pull-down resistor. However, the CE input current will be increased via a pull-down resistor when the IC
operates. If this IC is used with the correct output voltage for the CE pin, 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.

■NOTES ON USE

1. Please use this IC within the stated maximum ratings. 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 noise and/or phase lag depending

on output current. Please wire the input capacitor (C

3. 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.

level is shorter. For the XC6221A/B, the output voltage becomes unstable, when the CE pin is left

SS

level via R1 & R2. However, with the XC6221B/D series, the CL auto-discharge resistor is

SS

pin, the current falls and reaches about 30mA.

SS

pin. Therefore, time until the V

IN

level because the CE pin is short-circuited to VSS via an

SS

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

IN

XC6221

Series

pin will be

OUT

OUT

pin

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