Torex XC9106, XC9107 User Manual

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XC9106/XC9107 Series

ETR0405_004

PWM Control, PWM/PFM Switching Control,
Step-Up DC/DC Converters, Externally Applied Vref

■GENERAL DESCRIPTIO N

The XC9106 / XC9107 series are step-up DC/DC controller ICs with an externally applied reference voltage (Vref).
Output voltage will be set with external resistors (R
voltage externally and are suited to software applications that need to vary voltage, such as LCD power supply for PDA.
Output will be stable no matter which load capacitors are used but if a low ESR capacitor is used, RSENSE of about 0.1Ω will
be required and phase compensation will be achieved. This makes the use of ceramic capacitors much easier, and allows for
lower output ripple and reduced PCB area requirements. Tantalum and electrolytic capacitors can also be used, in which
case, R
Oscillation frequencies of high clock, low ripple 300kHz and low supply current 100kHz are available.
The XC9107 series are PWM/PFM automatic switching controlled. Control switches from PWM to PFM during light loads with
the XC9107 and the series is highly efficient from light loads to large output currents. By bringing the whole circuit down
while the series is in the stand-by mode (CE/PWM pin: low), supply current can be reduced to less than 1.0μA.

SENSE becomes unnecessary.

FB1 and 2) and Vref value. The series make it easy to control output

■

PPLICATIONS

●Power supply for LCDs

●PDAs

●Cellular phones

●Palmtop computers

●Portable audio systems

●Various multi-function power supplies

■FEATURES

Input Voltage : 0.9V ~ 10V
Power
Supply Voltage Range : 1.8V~10.0V and more than

VREF Input Range : 0.8V~2.5V (±2.0%)
Output Voltage : Vref x external split resistor ratio

Oscillation Frequency : 300kHz, 100kHz (±15%)
Output Current : More than 30mA
(V

Controls : PWM (XC9106)
: PWM/PFM auto-switching

High Efficiency : 85% (TYP.)
Stand-by Current : ISTB = 1.0μA (MAX.)
Load Capacitors : Low ESR capacitors compatible
Externally Applied Reference Voltage (Vref)
Packages : SOT-25, USP-6B
Environmentally Friendly

■

TYPICAL APPLICATION CIRCUIT

V

OUT

= 8V~25V

= 30mA

I

OUT

Ceramic CL :

10

μ

0.8V~2.5V

D/A converter

RSENSE : 10 0m
for Ceramic CL

*

RFB1 :

270k

Ω

CE/Vref

Ω

SD : MA737

CFB : 27p

RFB2 :
30k

Ω

15

2
3

4

L : 10

Nch Pow er

MOS FE
2SK2159

μ

CIN

* RSENSE is of no use in light load (uncontinuous mode)

applications such as a small LCD, even using ceramic
capacitor.

V

= 3.3V

IN

■TYPICAL PERFORMANCE
CHARACTERISTICS

XC9107D003MR

V

30
25
20

(V)

15

OUT

V

10

5
0

0.0 0.5 1.0 1.5 2.0 2.5 3.0

XC9107D003MR

30
25
20

(V)

15

OUT

V

10

5
0

0.1 1 10 100 1000

DD=VIN

☆GreenOperation-Compatible

Vref+0.7V

V

OUT=Vref x (RFB1+RFB2)/RFB2

IN=3.3V, VOUT=20V,

when external components are
used as in the circuits below.)

(XC9107)

: EU RoHS Compliant, Pb Free

Circuit as left

=3.3V, I

=30m A

OUT

Vref (V)

Circuit as left

=3.3V

V

DD=VIN

2.5V

2.0V

1.5V

Vref=0.8V

(mA)

I

OUT

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XC9106/XC9107 Series

■PIN CONFIGURATION

NC

12

FB

■PIN ASSIGNMENT

VDD

SOT-25

(TOP VIEW)

PIN NUMBER

SOT-25 USP-6B

1 6 FB Output Resistor Connection
2 2 VDD Supply Voltage

3 4

4 3 GND Ground
5 1 EXT External Transistor Connection

- 5 NC No Connection

■PRODUCT CLASSIFICATION

●Ordering Information

XC9106D①②③④⑤-⑥
XC9107D①②③④⑤-⑥

DESIGNATOR ITEM SYMBOL DESCRIPTION

GND

45

3

CE/Vref

NAME

FB 6

NC 5

CE/VIEW

PIN

CE/

Serves as Both Chip Enable Pin

Vref

and Reference Voltage Apply Pin.

(*1)

: PWM control

(*1)

: PWM/PFM automatic switching control

FUNCTION

1 EXT
2 VDD

3

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

DD pin.

①②

③

④⑤-⑥

(*1)

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

Reference Voltage

(Apply External)

Oscillation Frequency

Packages

(Oder Unit)

00 Fixed

3 300kHz
1 100kHz

MR

MR-G

DR

DR-G

SOT-25 (3,000/Reel)
SOT-25 (3,000/Reel)
USP-6B (3,000/Reel)

USP-6B (3,000/Reel)

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A

■BLOCK DIAGRAM

FB

Current

Ripple Detect

and FB

Error Amp.

Phase

Compensation

PWM

Comparator

Buffer,

Driver

XC9106/XC9107

Series

VDD

EXT

Vref with
Soft Start,

CE

CE / Vref

■

BSOLUTE MAXIMUM RATINGS

PARAMETER SYMBOL RATINGS UNITS

VDD pin Voltage VDD

FB Pin Voltage VFB

CE / Vref pin Voltage VCE / Vref

EXT pin Voltage VEXT
EXT pin Current IEXT/

Power Dissipation

SOT-25 150

USP-6B

Operating Temperature Range Topr

Storage Temperature Range Tstg

PWM/PFM

Controller

Pd

Ramp Wave

Generator,

OSC

FB, CE : CMOS INPUT
EXT : CMOS OUTPUT

-0.3～12.0

-0.3～12.0

-0.3～12.0

DD+0.3

-0.3～V
±100

100

-40～+85

-55～+125

GND

Ta = 25OC

V
V
V
V

mA

mW

O

C

O

C

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XC9106/XC9107 Series

■ELECTRICAL CHARACTERISTICS

XC9106D001MR, XC9107D001MR

(FOSC=100kHz)

PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX.

Output Voltage VOUT Vref = 0.9V 8.820 9.000 9.180 V

Reference

Voltage Range

Vref 0.8 - 2.5 V -

Vref = 0.8V 0.784 0.800 0.816

FB Control Voltage VFB

Vref = 0.9V 0.882 0.900 0.918
Vref = 2.5V 2.450 2.500 2.550

Supply Voltage Range

(*1)

V

DD

Operation Start Voltage VST1

Oscillation

Start Voltage (*1)

V

ST2

Operation Hold Voltage VHLD

CE/Vref=0.9V, V oltage applied, FB=0V

DD as shown right and

V

(Vref applied voltage+0.7V)

Recommended Circuit using

2SD1628, I

OUT=1.0mA

No external connections,

Recommended circuit using

2SD1628, I

OUT=1.0mA

1.8 - 10.0 V -

- - 0.9 V

- - 0.8 V

- - 0.7 V

Supply Current 1 IDD1 Same as VST2, VDD=3.300V - 29 41
Supply Current 2 IDD2 Same as IDD1, FB=1.2V - 14 19
Stand-by Current ISTB Same as IDD1, CE/Vref=0V - - 1.0

Oscillation Frequency FOSC Same as IDD1 85 100 115 kHz

Maximum Duty Ratio MAXDTY Same as IDD1 75 81 87 %

PFM Duty Ratio PFMDTY No Load (XC9106 series) 20 28 36 %

Efficiency EFFI

Recommended circuit using

XP161A1355

- 85 - %

Soft-start Time TSS Vref=0.9V 5.0 10.0 20.0 mS
CE “High” Voltage VCEH Same as IDD1 0.65 - - V
CE “Low” Voltage VCEL Same as IDD1 - - 0.20 V

EXT “High”

ON Resistance

EXT “Low”

ON Resistance

CE “High” Current ICEH

REXTH Same as IDD1, VEXT=VOUT-0.4V - 24 36

REXTL Same as IDD1, VEXT=0.4V - 16 24

Same as IDD2, CE=0.8V -1.0 - 0.0
Same as I

DD2, CE=2.5V 0.0 - 2.5

CE “Low” Current ICEL Same as IDD2, CE=0V - - -0.1
FB “High” Current IFBH Same as IDD2, FB=VDD - - 0.1

FB “Low” Current IFBL Same as IDD2, FB=1.0V - - -0.1

Test Conditions: Unless otherwise stated, CL: Ceramic, recommended MOSFET should be connected.
V
V

NOTE:

*1: Although the IC starts step-up operations from a V

V

DD ≧ 1.8V and (Vref applied voltage＋0.7V). Therefore, a VDD of more than 1.8V and (Vref applied voltage＋0.7V) is

recommended when V

DD= 3.3V → Vref= 0.09V, RFB1,2×10
IN= 3.3V → IOUT= 50mA

DD of 0.8V, the output voltage and oscillation frequency are stabilized at

DD is supplied from VIN or other power sources.

Ta=25

UNITS CIRCUIT

V

μA
μA
μA

Ω

Ω

μA
μA

μA
μA

①

④

③

④

③
④

④
⑤
④
④
①

①
①

⑤
⑤

④

④

⑤
⑤

⑤
⑤

O

C

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