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A5972D の電気的特性と機能

A5972DのメーカーはSTMicroelectronicsです、この部品の機能は「2A switch step down switching regulator」です。


製品の詳細 ( Datasheet PDF )

部品番号 A5972D
部品説明 2A switch step down switching regulator
メーカ STMicroelectronics
ロゴ STMicroelectronics ロゴ 




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A5972D Datasheet, A5972D PDF,ピン配置, 機能
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A5972D
2A switch step down switching regulator
for automotive applications
Features
Qualified following the AEC-Q100
requirements (temperature Grade 3), see
PPAP for more details.
Temperature range -40 °C to 85 °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
Applications
Dedicated to automotive applications
Figure 1. Typical application
SO8
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)
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.
VIN=4.4V to 35V
VCC
OUT
C1
10uF
C4
22nF
C3
220pF
COMP
A5972D
4.7K
R3
GND
FB
L1
33uH
D1
STPS2L40U
VOUT=3.3V
R1
5.6K
C2
100uF
R2
3.3K
November 2007
Rev 2
1/12
www.st.com
1

1 Page





A5972D pdf, ピン配列
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A5972D
1 Pin settings
1.1 Pin connection
Figure 2. Pin connection (top view)
1.2
Pin description
Table 1.
N
1
2,3,6,7
4
5
8
Pin description
Pin Description
OUT
Regulator output.
GND
Ground.
COMP
FB
E/A output for frequency compensation.
Feedback input. Connecting directly to this pin results in an output
voltage of 1.23V. An extenal resistive divider is required for higher output
voltages.
VCC
Unregulated DC input voltage.
3/12


3Pages


A5972D 電子部品, 半導体
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Typical characteristics
4 Typical characteristics
Figure 3. Output voltage vs junction
temperature
Figure 4. Line regulatior
A5972D
Figure 5. Output voltage vs junction
temperature
Figure 6. Quiescent current vs junction
temperature
Figure 7. Shutdown current vs junction Figure 8. Junction temperature vs
temperature
output current
6/12

6 Page



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部品番号部品説明メーカ
A5972D

2A switch step down switching regulator

STMicroelectronics
STMicroelectronics


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