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参数资料
| 型号： | L6902D013TR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 3.2 A SWITCHING REGULATOR, 287 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | SO-8 |
| 文件页数： | 1/7页 |
| 文件大小： | 125K |
| 代理商： | L6902D013TR |
1/7
L6902D
October 2004
1
FEATURES
■
UP TO 1A OUTPUT CURRENT
■
OPERATING INPUT VOLTAGE FROM 8V TO 36V
■
PRECISE 3.3V (±2%) REFERENCE VOLTAGE
■
5% OUTPUT CURRENT ACCURACY
■
OUTPUT VOLTAGE ADJUSTABLE FROM
1.235V TO 34V
■
250KHz INTERNALLY FIXED FREQUENCY
■
VOLTAGE FEEDFORWARD
■
ZERO LOAD CURRENT OPERATION
■
ADJUSTABLE CURRENT LIMIT
■
PROTECTION AGAINST FEEDBACK
DISCONNECTION
■
THERMAL SHUTDOWN
2
APPLICATIONS
■
CHARGERS FOR NiCd, NiMH BATTERIES
AND PREREGULATOR FOR LITHIUM-ION
BATTERIES
■
ADJUSTABLE CURRENT GENERATOR
■
SIMPLE STEP-DOWN CONVERTERS WITH
ADJUSTABLE CURRENT LIMIT
■
BATTERY EQUIPPED SYSTEMS
■
DISTRIBUTED POWER SUPPLY
■
MOBILE PC & SUBNOTEBOOK
3
DESCRIPTION
The L6902D is a complete and simple step down
switching regulator with adjustable current limit.
Based on a voltage mode structure it integrates a cur-
rent error amplifier to have a constant voltage and con-
stant current control.
By means of an on board current sense resistor and
the availability of the current sense pins (both com-
patible to Vcc and for Cs- compatible with GND too)
a current limit programming is very simple and accu-
rate (±5%). Moreover constant current control can be
used to charge NiMH and NiCd batteries.
The device can be used as a standard DC/DC con-
verter with adjustable current limit (set by using the
external sense resistor).
The internal robust P-Channel DMOS transistor with a
typical of 250m
assures high efficiency and a mini-
mum dropout even at high output current level. The in-
ternal limiting current (latched function) of typical value
of 2.5A protects the device from accidental output short
circuit avoiding dangerous loads damage.
If the temperature of the chip goes higher than a fixed
internal threshold (150°C with 20°C hysteresis), the
power stage is turned off.
UP TO 1A SWITCHING REGULATOR WITH
ADJUSTABLE CURRENT LIMIT
Figure 2. Test And Application Circuit
L1 22
H
OUT
C1
10
F
25V
CERAMIC
C3
220pF
C2
22nF
D1
STPS340U
R3
5.1K
C4
100
F
10V
POSCAP
R1
5.6K
RSENSE
100m
R2
3.3K
VIN=8V to 36V
3.3V
VOUT=3.3V
VCC
COMP
VREF
GND
FB
D01IN1306A
8
6
4
2
3
5
1
7
Rev. 8
Figure 1. Package
Table 1. Order Codes
Part Number
Package
L6902D
SO-8
L6902D013TR
SO-8 in Tape & Reel
SO-8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6902N | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| L6910 | 功能描述:DC/DC 开关控制器 5.0 to 12V Step-Down RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| L6910_05 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:ADJUSTABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION |
| L6910A | 功能描述:DC/DC 开关控制器 5.0 to 12V Step-Down RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| L6910ATR | 功能描述:DC/DC 开关控制器 5.0 to 12V Step-Down RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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