- 您现在的位置：买卖IC网 > PDF目录80246 > L5970ADTR (STMICROELECTRONICS) 1.8 A SWITCHING REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO8 PDF资料下载
参数资料
| 型号： | L5970ADTR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 1.8 A SWITCHING REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | SO-8 |
| 文件页数： | 1/11页 |
| 文件大小： | 139K |
| 代理商： | L5970ADTR |
1/11
L5970AD
March 2005
1
General Features
■ 1.5A INTERNAL SWITCH
■ OPERATING INPUT VOLTAGE FROM 4.4V TO 36V
■ 3.3V / (
±2%) REFERENCE VOLTAGE
■ OUTPUT VOLTAGE ADJUSTABLE FROM
1.235V TO 35V
■ LOW DROPOUT OPERATION: 100% DUTY
CYCLE
■ 500KHz INTERNALLY FIXED FREQUENCY
■ VOLTAGE FEEDFORWARD
■ ZERO LOAD CURRENT OPERATION
■ INTERNAL CURRENT LIMITING
■ INHIBIT FOR ZERO CURRENT
CONSUMPTION
■ SYNCHRONIZATION
■ PROTECTION AGAINST FEEDBACK
DISCONNECTION
■ THERMAL SHUTDOWN
1.1 APPLICATIONS:
■ CONSUMER: STB, DVD, TV, VCR,CAR
RADIO, LCD MONITORS
■ NETWORKING: XDSL, MODEMS,DC-DC
MODULES
■ COMPUTER: PRINTERS, AUDIO/GRAPHIC
CARDS, OPTICAL STORAGE, HARD DISK
DRIVE
■ INDUSTRIAL: CHARGERS, CAR BATTERY
DC-DC CONVERTERS
2
Description
The L5970AD is a step down monolithic power
switching regulator with a switch current limit of 1.5A
so it is able to deliver more than 1A DC current to the
load depending on the application conditions.
The output voltage can be set from 1.235V to 35V.
The device uses an internal P-Channel D-MOS tran-
sistor (with a typical RDSON of 200m
) as switching
element to avoid the use of bootstrap capacitor and
guarantee high efficiency.
An internal oscillator fixes the switching frequency at
500KHz to minimize the size of external components.
Having a minimum input voltage of 4.4V only, it is
particularly suitable for 5V bus, available in all com-
puter related applications.
Pulse by pulse current limit with the internal frequen-
cy modulation offers an effective constant current
short circuit protection.
1.5A SWITCH STEP DOWN SWITCHING REGULATOR
Figure 2. Test and Application Circuit
D05IN1530
8
4
5
1
7
L5970AD
C1
10
F
35V
CERAMIC
C2
330
F
10V
VOUT=3.3V
VIN = 4.4V to 35V
R1
5.6K
R2
3.3K
R3
4.7K
C4
22nF
C3
220pF
3
L1 15
H
D1
STPS2L25U
COMP
VCC
OUT
FB
GND
INH
2
6
3.3V
SYNC.
VREF
Figure 1. Package
Table 1. Order Codes
Part Number
Package
L5970AD
SO-8
L5970ADTR
SO-8 in Tape & Reel
SO-8
Rev. 1
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3858EUH-2#TRPBF | DUAL SWITCHING CONTROLLER, 900 kHz SWITCHING FREQ-MAX, PQCC32 |
| LM2670SDADJEP | 5.4 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PDSO14 |
| LTC3900MPS8 | SWITCHING REGULATOR, PDSO8 |
| LM336H-2.5 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.49 V, MBCY3 |
| LPC48DP | 2-OUTPUT 75 W DC-DC REG PWR SUPPLY MODULE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L5970D | 功能描述:直流/直流开关调节器 1.2 to 35V 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 |
| L5970D_07 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Up to 1A step down switching regulator |
| L5970D_0710 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Up to 1A step down switching regulator |
| L5970D013 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:UP TO 1A STEP DOWN SWITCHING REGULATOR |
| L5970D013TR | 功能描述:直流/直流开关调节器 1.2 to 35V 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 |
发布紧急采购，3分钟左右您将得到回复。