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參數(shù)資料
| 型號(hào)： | L5973AD |
| 廠(chǎng)商： | 意法半導(dǎo)體 |
| 元件分類(lèi)： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 抗輻射高效，5安培開(kāi)關(guān)穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 1/13頁(yè) |
| 文件大?。?/td> | 166K |
| 代理商： | L5973AD |
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L5973AD
September 2003
I
2A INTERNAL SWITCH
I
OPERATING INPUT VOLTAGE FROM 4.4V TO 36V
I
3.3V / (
±
2%) REFERENCE VOLTAGE
I
OUTPUT VOLTAGE ADJUSTABLE FROM
1.235V TO 35V
I
LOW DROPOUT OPERATION: 100% DUTY
CYCLE
I
500KHz INTERNALLY FIXED FREQUENCY
I
VOLTAGE FEEDFORWARD
I
ZERO LOAD CURRENT OPERATION
I
INTERNAL CURRENT LIMITING
I
INHIBIT FOR ZERO CURRENT
CONSUMPTION
I
SYNCHRONIZATION
I
PROTECTION AGAINST FEEDBACK
DISCONNECTION
I
THERMAL SHUTDOWN
APPLICATIONS:
I
CONSUMER: STB, DVD, TV, VCR,CAR
RADIO, LCD MONITORS
I
NETWORKING: XDSL, MODEMS,DC-DC
MODULES
I
COMPUTER: PRINTERS, AUDIO/GRAPHIC
CARDS, OPTICAL STORAGE, HARD DISK
DRIVE
I
INDUSTRIAL: CHARGERS, CAR BATTERY
DC-DC CONVERTERS
DESCRIPTION
The L5973AD is a step down monolithic power
switching regulator with a switch current limit of 2A so
it is able to deliver more than 1.5A DC current to the
load depending on the application conditions.
The output voltage can be set from 1.235V to 35V.
The high current level is also achieved thanks to an
SO8 package with exposed frame, that allows to re-
duce the R
th(j-amb)
down to approximately 40°C/W
The device uses an internal P-Channel D-MOS tran-
sistor (with a typical 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.
HSOP8 - EXPOSED PAD
ORDERING NUMBERS: L5973AD (Tube)
L5973ADTR (Tape & Reel)
2A SWITCH STEP DOWN SWITCHING REGULATOR
TEST APPLICATION CIRCUIT
D03IN1453
8
4
5
1
7
L5973AD
C1
10
μ
F
35V
CERAMIC
C2
330
μ
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
μ
H
D1
STPS340U
COMP
VCC
OUT
FB
GND
INH
2
6
3.3V
SYNC.
VREF
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L5973ADTR | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| L5973 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| L5973D | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| L5994A | ADJUSTABLE TRIPLE OUTPUT POWER SUPPLY CONTROLLER |
| L5994 | ADJUSTABLE TRIPLE OUTPUT POWER SUPPLY CONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L5973AD_07 | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:2A switch step down switching regulator |
| L5973AD_08 | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:2 A switch step down switching regulator |
| L5973ADTR | 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 1.235 to 35V Step-Dn RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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 |
| L5973D | 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 1.235 to 35V Step-Dn RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| L5973D_08 | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:2.5 A switch step down switching regulator?癎 |
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