參數(shù)資料
型號: L5970AD
廠商: STMICROELECTRONICS
元件分類: 穩(wěn)壓器
英文描述: 1.8 A SWITCHING REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO8
封裝: SO-8
文件頁數(shù): 1/11頁
文件大?。?/td> 139K
代理商: L5970AD
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
相關(guān)PDF資料
PDF描述
L5972D013TR 3 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PDSO8
L5972D 3 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PDSO8
L5973AD 2.3 A SWITCHING REGULATOR, PDSO8
L5973D 3.5 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PDSO8
L5973D013TR 3.5 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L5970ADTR 功能描述:直流/直流開關(guān)調(diào)節(jié)器 STEP DOWN MONOLITHIC SWITCH REG 1.5A RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)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(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
L5970D 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1.2 to 35V Step-Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)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(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
L5970D_07 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Up to 1A step down switching regulator
L5970D_0710 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Up to 1A step down switching regulator
L5970D013 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:UP TO 1A STEP DOWN SWITCHING REGULATOR