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A5970AD Datasheet

  • A5970AD

  • Up to 1 A switch step down switching regulator for automotiv...

  • 17頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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A5970AD
Up to 1 A switch step down switching regulator
for automotive applications
Features
鈻?/div>
Qualified following the AEC-Q100
requirements (temperature grade 3), see
PPAP for more details.
Temperature range -40
擄C
to 85
擄C
1 A DC output current
Operating input voltage from 4.4 V to 36 V
3.3 V / (鹵2 %) reference voltage
Output voltage adjustable from 1.235 V to 35 V
Low dropout operation: 100 % duty cycle
500 kHz Internally fixed frequency
Voltage feedforward
Zero load current operation
Internal current limiting
Inhibit for zero current consumption
Synchronization
Protection against feedback disconnection
Thermal shutdown
The A5970AD is a step down monolithic power
switching regulator with a switch current limit of
1.35 A so it is able to deliver more than 1 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 R
DS(on)
of
250 m鈩? as switching element to avoid the use of
bootstrap capacitor and guarantee high efficiency.
An internal oscillator fixes the switching frequency
at 500 kHz to minimize the size of external
components. Having a minimum input voltage of
4.4 V only, it is particularly suitable for 5 V bus,
available in all computer related applications.
Pulse by pulse current limit with the internal
frequency modulation offers an effective constant
current short circuit protection.
L1 15uH
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鈻?/div>
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SO-8
Description
Applications
鈻?/div>
Dedicated to automotive applications
Figure 1.
Application schematic
OUT
SYNCH
4
2
Vout=3.3V
VIN=4.4V to 35V
VCC
COMP
C4
C1
10uF
35V
CERAMIC
C3
220pF
R3
4k7
22nF
8
1
A5970AD
FB
6
5
7
GND
INH
3
D1
STPS340U
R1
5k6
C2
100uF
10V
R2
3k3
VREF
3.3V
May 2008
Rev 1
1/16
www.st.com
1

A5970AD 產(chǎn)品屬性

  • 0現(xiàn)貨

  • 停產(chǎn)

  • Automotive, AEC-Q100

  • 管件

  • 停產(chǎn)

  • 降壓

  • 正

  • 可調(diào)式

  • 1

  • 4V

  • 36V

  • 1.235V

  • 36V

  • 1A

  • 500kHz

  • 無

  • -40°C ~ 150°C（TJ）

  • 表面貼裝型

  • 8-SOIC（0.154"，3.90mm 寬）

  • 8-SOIC

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