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Ta=25℃

PARAMETER

SYMBOL

RATINGS

UNITS

- 0.3 ∼ 6.5

V

Lx Voltage

V

DCOUT Voltage

- 0.3 ∼ 6.5

V

EN1 Voltage

- 0.3 ∼ 6.5

V

Lx Current

±1500

mA

V

V

VROUT Current

700

(*1)

mA

VROUT Voltage

V

EN2 Voltage

V

Power Dissipation

(Ta=25℃)

USP-12B01

Pd

150

mW

Junction Temperature

Tj

125

℃

Operating Temperature Range

Topr

-40∼+85

℃

Storage Temperature Range

Tstg

-55∼+125

℃

R2

R1

Error Amp.

Vref with

Soft Start,

CE

Phase

Compensation

PWM/PFM

Selector

Current Feedback

Current Limit

PWM

Comparator

Logic

Synch

Buffer

Drive

R3

R4

UVLO

UVLO Cmp

Ramp Wave

Generator

OSC

Lx

CE/MODE

Control

Logic

CE/

VSHORT

CE

R2

R1

Error Amp.

Vref with

Soft Start,

CE

Phase

Compensation

PWM/PFM

Selector

Current Feedback

Current Limit

PWM

Comparator

Logic

Synch

Buffer

Drive

R3

R4

UVLO

UVLO Cmp

Ramp Wave

Generator

OSC

Lx

V

SS

V

IN

V

OUT

CE/MODE

Control

Logic

VSHORT

XC9235A/XC9236A

XC9235B/XC9236B

、）

(CL放電機能有

高速ソフトスタート

V

SS

V

IN

V

OUT

■BLOCK DIAGRAMS

■MAXIMUM ABSOLUTE RATINGS

* XC9235 control scheme is a fixed PWM because that the “CE/MODE Control Logic” outputs a low level signal to the “PWM/PFM Selector”.

* XC9236 control scheme is an auto PWM/PFM switching because the “CE/MODE Control Logic” outputs a high level signal to the “PWM/PFM Selector”.

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

XC6601B (Without Pull-down)