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Qualified following the AEC-Q100

requirements (temperature Grade 3), see

PPAP for more details.

Temperature range -40

擄C

to 85

擄C

1.5 A DC output current

Operating input voltage from 4.4 V to 36 V

Output voltage adjustable from 1.235 V to 35 V

Low dropout operation: 100% duty cycle

250 kHz internally fixed frequency

Voltage feedforward

Zero load current operation

Internal current limiting

Protection against feedback disconnection

Thermal shutdown

SO8

鈻?/div>

Description

The A5972D is a step down monolithic power

switching regulator with a minimum switch current

limit of 2 A so it is able to deliver more than 1.5 A

DC current to the load depending on the

application conditions.

The output voltage can be set from 1.235 V

to 35 V. The device uses an internal P-channel D-

MOS transistor (with a typical Rdson of 250 m鈩?

as switching element to minimize the size of the

external components.

An internal oscillator fixes the switching frequency

at 250 kHz.

Having a minimum input voltage of 4.4 V only, it is

particularly suitable for 5 V bus.

Pulse by pulse current limit with the internal

frequency modulation offers an effective constant

current short circuit protection.

Applications

鈻?/div>

Dedicated to automotive applications

Figure 1.

Typical application

L1

33uH

VIN=4.4V to 35V

VCC

COM P

OUT

VO U T=3.3V

C4

C1

10uF

C3

220pF

4.7K鈩?/div>

R3

22nF

A5972D

GND

FB

D1

STPS2L40U

R1

5.6K

C2

100uF

R2

3.3K

November 2007

Rev 2

1/12

www.st.com

1

其它有關文件
A5972D View All Specifications
標準包裝
1
類別
集成電路 (IC)
家庭
PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器
系列
-
類型
降壓（降壓）
輸出類型
可調式
輸出數(shù)
1
輸出電壓
1.235 V ~ 36 V
輸入電壓
4 V ~ 36 V
PWM 型
-
頻率 - 開關
250kHz
電流 - 輸出
1.5A
同步整流器
無
工作溫度
-40°C ~ 125°C
安裝類型
表面貼裝
封裝/外殼
8-SOIC（0.154"，3.90mm 寬）
包裝
Digi-Reel®
供應商設備封裝
8-SO
其它名稱
497-10185-6

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