XC9106_1 TOREX [Torex Semiconductor], XC9106_1 Datasheet

XC9106_1

Manufacturer Part Number

XC9106_1

Description

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

Manufacturer

TOREX [Torex Semiconductor]

Datasheet

1.XC9106_1.pdf (11 pages)

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XC9106/XC9107

PWM Control,PWM/PFM Switching Control,

Step-Up DC/DC Converters, Externally Applied Vref

■GENERAL DESCRIPTION

The XC9106 / 07 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, R

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.

■APPLICATIONS

●Power supply for LCDs

●PDAs

●Cellular phones

●Palmtop computers

●Portable audio systems

●Various multi-function power supplies

■TYPICAL APPLICATION CIRCUIT

* R

applications such as a small LCD, even using ceramic

capacitor.

SENSE

OUT

D/A converter

OUT

SENSE

Ceramic CL :

0.8V~2.5V

= 8V~25V

= 30mA

is of no use in light load (uncontinuous mode)

10 μ F

becomes unnecessary.

RSENSE : 100m Ω

for Ceramic CL

270k Ω

RFB1 :

CE/Vref

CFB : 27pF

RFB2 :

30k Ω

SD : MA737

Nch Pow er

L : 10 μ H

MOS FET

2SK2159

CIN

FB1

= 3.3V

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

Series

■TYPICAL PERFORMANCE

■FEATURES

Input Voltage

Power

Supply Voltage Range : 1.8V~10.0V and more than

Output Voltage

Oscillation Frequency : 300kHz, 100kHz (±15%)

Output Current

Controls

High Efficiency

Stand-by Current

Load Capacitors

Externally Applied Reference Voltage (Vref)

Packages

REF

CHARACTERISTICS

Input Range

XC9107D003MR

0.0

XC9107D003MR

0.1

0.5

1.0

OUT

Vref (V)

1.5

(mA)

=3.3V, I

2.0

2.5V

: 0.9V ~ 10V

: 0.8V~2.5V (±2.0%)

: Vref x external split resistor ratio

: More than 30mA

: PWM (XC9106)

: PWM/PFM auto-switching

: 85% (TYP.)

: ISTB = 1.0μA (MAX.)

: Low ESR capacitors compatible

: SOT-25, USP-6B

Circuit as lef t

Circuit as left

2.0V

Vref+0.7V

when external components are

used as in the circuits below.)

(XC9107)

OUT

Vref=0.8V

100

OUT

2.5

=30mA

1.5V

=3.3V

=3.3V, V

=Vref x (R

SENSE

1000

3.0

☆GO-Compatible

of about 0.1Ω will

OUT

FB1

=20V,

ETR0405_002

FB2

)/R

1/11

FB2

Related parts for XC9106_1

XC9106_1 Summary of contents

Page 1

XC9106/XC9107 PWM Control,PWM/PFM Switching Control, Step-Up DC/DC Converters, Externally Applied Vref ■GENERAL DESCRIPTION The XC9106 / 07 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 ...

Page 2

XC9106/XC9107 ■PIN CONFIGURATION NC GND CE/VIEW CE/Vref VDD SOT-25 (TOP VIEW) ■PIN ASSIGNMENT PIN NUMBER PIN NAME SOT-25 USP- Output Resistor Connection CE/ ...

Page 3

DIAGRAM Current Ripple Detect FB and FB Error Amp. Vref with Soft Start Vref ■ABSOLUTE MAXIMUM RATINGS PARAMETER V pin Voltage DD FB Pin Voltage CE / Vref pin Voltage EXT pin Voltage EXT pin Current ...

Page 4

XC9106/XC9107 ■ELECTRICAL CHARACTERISTICS XC9106D001MR, XC9107D001MR PARAMETER SYMBOL Output Voltage V OUT Reference Vref Voltage Range FB Control Voltage V FB Supply Voltage Range V DD (*1) Operation Start Voltage V ST1 Oscillation V ST2 Start Voltage (*1) Operation Hold Voltage ...

Page 5

CHARACTERISTICS (Continued) XC9106D003MR, XC9107D003MR PARAMETER SYMBOL Output Voltage V OUT Reference Vref Voltage Range FB Control Voltage V FB Supply Voltage Range V DD (*1) Operation Start Voltage V ST1 Oscillation V ST2 Start Voltage (*1) Operation Hold Voltage ...

Page 6

XC9106/XC9107 ■OPERATIONAL EXPLANATION The XC9106 / 07 series are reference voltage (Vref) apply external step-up DC/DC controller ICs. Output voltage will be set with external resistors (R and R FB1 suited to software applications that need to vary voltage such ...

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XC9106_1 TOREX [Torex Semiconductor], XC9106_1 Datasheet

XC9106_1

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XC9106_1 Summary of contents

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