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參數資料
| 型號： | L5971D |
| 廠商： | 意法半導體 |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Isolated Flyback Switching Regulator with 9V Output |
| 中文描述： | 隔離反激式開關穩壓9V輸出 |
| 文件頁數： | 1/11頁 |
| 文件大小： | 96K |
| 代理商： | L5971D |
UP TO 1.5A STEP DOWN CONVERTER
OPERATING INPUT VOLTAGE FROM 6.5V
TO 28V
PRECISE 1.26V (
±
1%) INTERNAL REFER-
ENCE VOLTAGE
OUTPUT VOLTAGE ADJUSTABLE FROM
1.26V TO 20V
SWITCHING FREQUENCY ADJUSTABLE UP
TO 500KHz
VOLTAGEFEEDFORWARD
ZEROLOAD CURRENT OPERATION
INTERNAL CURRENT LIMITING (PULSE-BY-
PULSEAND HICCUPMODE)
INHIBIT FOR ZERO CURRENT CONSUMP-
TION
PROTECTION AGAINST FEEDBACK DIS-
CONNECTION
THERMAL SHUTDOWN
SOFTSTART FUNCTION
DESCRIPTION
The L5971 is a step down monolithic power
switching regulator delivering 1.5A at a voltage
between 1.26V and 20V (selected by a simple
external divider). Realized in BCD mixed technol-
ogy, the device uses an internal power D-MOS
transistor (with a typical Rdson of 0.25
) to ob-
tain very high efficencyand high switching speed.
A switching frequency up to 500KHz is achiev-
able (the maximum power dissipation of the pack-
ages must be observed).
Features of this new generations of DC-DC con-
verter include pulse-by-pulse current limit, hiccup
mode for short circuit protection, voltage feedfor-
ward regulation, soft-start, protection against
feedback loop disconnection, inhibit for zero cur-
rent consumptionand thermalshutdown.
The device is available in plastic dual in line,
MINIDIP 8 for standard assembly, and SO16 for
SMD assembly.
Typical Applications:
- Highefficiencystep-downconverter
- Portablecomputers
- Batterycharger
- Distributed power
- PDAsand MobileComminicators
May 2000
ORDERING NUMBERS:
L5971 (Minidip)
L5971D (SO16)
L5971
1.5A STEP DOWN SWITCHING REGULATOR
Minidip
SO16W
D98IN832C
5(11)
2(3)
8(14)
4(5,6)
1(2)
L5971
C
1
47μ
F
30V
C
8
330
μ
F
V
O
=2.5V/1.5A
Vi=6V to 28V
R
1
22K
C
1.2nF
R
2
9.1K
C
4
22nF
3(4)
7(13)
L1
30
μ
H
6(12)
D1
STPS
3L40U
C
47nF
C
6
100nF
R
3
R
4
TYPICAL APPLICATION CIRCUIT
1/11
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| L5972 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| L5971D013TR | 制造商:STMicroelectronics 功能描述: |
| L5972 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2A SWITCH STEP DOWN SWITCHING REGULATOR |
| L5972D | 功能描述:直流/直流開關調節器 1.235 to 35V Step-Dn RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| L5972D_0710 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2A switch step down switching regulator |
| L5972D013TR | 功能描述:直流/直流開關調節器 1.235 to 35V Step-Dn RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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