HT7727A 查看數據表（PDF） - Holtek Semiconductor

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HT7727A

PFM Step-up DC/DC Converter

Holtek Semiconductor 

Application Circuits

Without CE Pin

S R 0 6 0 2 S e r ie s

A B C E le c tr o n ic s C o r p .

47mH ~100mH

V IN

1N 5817

HT77xxA

V OUT

4 7 m F ( T a n ta lu m )

LX

H T77xxA

VO UT

S e r ie s

GND

2 2 m F ( T a n ta lu m )

With CE Pin

S R 0 6 0 2 S e r ie s

A B C E le c tr o n ic s C o r p .

47mH ~100mH

1N 5817

V IN

V OUT

4 7 m F ( T a n ta lu m )

LX

H T77xxA

VO UT

S e r ie s

CE

GND

S R 0 6 0 2 S e r ie s

A B C E le c tr o n ic s C o r p .

47mH ~100mH

V IN

1N 5817

2 2 m F ( T a n ta lu m )

V OUT

4 7 m F ( T a n ta lu m )

LX

H T77xxA

VO UT

S e r ie s

CE

GND

2 2 m F ( T a n ta lu m )

Note:

For the SOT23-5 package, when CE is pulled low, the internal blocks of the device, such as the reference band

gap, gain block, and all feedback and control circuitry will be switched off. The boost converter¢s output, VOUT,

will be at a value one Schottky diode voltage drop below the input voltage and the LX pin remains in a high im-

pedance condition. The output capacitor and load at VOUT determine the rate at which VOUT decays.

Rev 1.40

8

June 25, 2016

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