UT2306-3.3V 查看數據表（PDF） - Unisonic Technologies

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UT2306-3.3V

MICROPOWER DC/DC CONVERTERS WITH LOW-BATTERY DETECTOR ACTIVE IN SHUTDOWN

Unisonic Technologies 

UTC UT2306/UT2306-3.3V/UT2306-5.0V

LINEAR INTEGRATED CIRCUIT

Load Transient

Response

OVUT

100mV / DIV

AC COUPLED

ILOAD

200mA

0

100 μ s / DIV

Burst Mode Operation

OV UT

100mV/DIV

AC COUPLED

Vsw

5V/DIV

IL

500mA/DIV

VIN=2.5V 20μ s/DIV

VOUT=5V

ILOAD=185mA

L=22 μ H

BLOCK DIAGRAMS

VIN

+

L1

C1

2 LBO

3 VIN

1 LBI

+

-

A3

1.17V

1.5V

UNDERVOLTA

GELOCKOUT

36mV

+

A2

-

R1

R2 7.2Ω

1K

R3

OFF BIAS

-1V

Q3

8 FB

-

A1

R4

+

1.24V

VREF

ENABLE

TIMERS

6μs ON

1.5μs OFF

1K

Q2

DRIVER

×1

D1

4 SW

Q1

×200

VOUT

+

C2

SHUTDOW N

7 SHDN

6 ILIM

5 GND

Figure 1. UT2306 Block Diagram. Independent Low-Battery Detector A3 Remains Alive When Device Is in Shutdown

UTC UNISONIC TECHNOLOGIES CO., LTD. 5

QW-R103-029,A

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