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参数资料
| 型号： | L4971D |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | SO-16 |
| 文件页数： | 6/13页 |
| 文件大小： | 571K |
| 代理商： | L4971D |
L4971
2/13
Figure 2. Block Diagram
Figure 3. Pin Connections
Table 2. Pin Description
(*) Pins 1, 7, 8, 9, 10, 15 and 16 are not internally, electrically connected to the die.
DIP
SO (*)
Name
Function
1
2
GND
Ground
2
3
SS_INH
A logic signal (active low) disables the device (sleep mode operation).
A capacitor connected between this pin and ground determines the soft start time.
When this pin is grounded disabled the device (driven by open collector/drain).
3
4
OSC
An external resistor connected between the unregulated input voltage and this pin and
a capacitor connected from this pin to ground fix the switching frequency. (Line feed
forward is automatically obtained)
4
5, 6
OUT
Stepdown regulator output
511
VCC
Unregulated DC input voltage
6
12
BOOT
A capacitor connected between this pin and OUT allows to drive the internal DMOS
Transistor
7
13
COMP
E/A output to be used for frequency compensation
8
14
FB
Stepdown feedback input. Connecting directly to this pin results in an output voltage of
3.3V. An external resistive divider is required for higher output voltages.
INHIBIT
SOFTSTART
VOLTAGES
MONITOR
THERMAL
SHUTDOWN
E/A
PWM
3.3V
OSCILLATOR
R
S
Q
INTERNAL
REFERENCE
INTERNAL
SUPPLY
3.3V
5.1V
DRIVE
CBOOT
CHARGE
CBOOT
CHARGE
AT LIGHT
LOADS
2
7
8
FB
COMP
SS_INH
3
1
4
6
5
BOOT
OSC
GND
OUT
VCC
D97IN594
GND
SS_INH
OSC
OUT
1
3
2
4
VCC
BOOT
COMP
FB
8
7
6
5
D97IN595
N.C.
GND
SS_INH
OSC
OUT
N.C.
OUT
N.C.
BOOT
VCC
COMP
FB
N.C.
1
3
2
4
5
6
7
8
14
13
12
11
10
9
15
16
D97IN596
DIP8
SO16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L4971D013TR | 功能描述:直流/直流开关调节器 3.3 to 50V Step-Down RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| L4972 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:2A SWITCHINGREGULATOR |
| L4972A | 功能描述:直流/直流开关调节器 5.1 to 40V 2.0 Amp RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| L4972A | 制造商:STMicroelectronics 功能描述:IC SWITCHING REG 2A 4972 DIP20 |
| L4972A_05 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:2A SWITCHING REGULATOR |
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