2/16

CE/B

Error

Amp.

Vref with

Soft Start,

CE

Current Feedback

Current Limit

PWM

Comparator

UVLO

UVLO Cmp

Ramp Wave

Generator

OSC

Lx

FB

CE

Control

Logic

Inductor

GND

L2

L1

PWM/PFM

Selector

Phase

Compensation

R2

R1

Thermal

Shutdoun

Synch

Buffer

Drive

Logic

CE

■

BLOCK DIAGRAM

XCL211/XCL212 Series (USP-11B01)

* The XCL211 offers a fixed PWM control, a Control Logic of PWM/PFM Selector is fixed at “PWM” internally.

The XCL212 control scheme is a fixed PWM/PFM automatic switching, a Control Logic of PWM/PFM Selector is fixed at “PWM/PFM automatic

switching” internally.

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

■

PRODUCT CLASSIFICATION

●

Ordering Information

XCL211①②③④⑤⑥

Fixed PWM

XCL212①②③④⑤⑥

PWM/PFM Auto Switching

DESIGNATOR

ITEM

SYMBOL

DESCRIPTION

①

Type

B

Refer to Selection Guide

②③

Reference Voltage

08

Reference Voltage is fixed at 0.8V

④

Oscillation Frequency

2

2.4MHz

Package (Order Unit)

DR

●

Selection Guide

TYPE

SOFT-START

TIME

CHIP

ENABLE

CURRENT

LIMITER

THERMAL

SHUTDOWN

UVLO

DISCHARGE

B

Fixed

Yes

Yes

Yes

Yes

Yes