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参数资料
| 型号： | SP7661ER-L |
| 厂商： | Exar Corporation |
| 文件页数： | 5/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 3A 26DFN |
| 产品变化通告： | SP76(55,61)ER-L/(TR) Obsolescence 29/Jul/2011 |
| 标准包装： | 500 |
| 系列： | Power Blox™ |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 20.2 V |
| 输入电压： | 4.75 V ~ 22 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 600kHz |
| 电流 - 输出： | 3A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 26-VFDFN 裸露焊盘 |
| 包装： | 散装 |
| 供应商设备封装： | 26-DFN（7x4） |
PIN DESCRIPTION
SP7661
DFN PACKAGE
7mm x 4mm (Option 2)
LX 26
LX 25
LX 24
LX 23
V CC 2 2
UV IN 21
GND 20
GND 19
V IN 18
BOTTOM VIEW
Heatsink Pad 1
Connect to Lx
Pin 27
Heatsink Pad 2
Connect to GND
Pin 28
1
2
3
4
5
6
7
8
9
P GND
P GND
P GND
P GND
GND
V FB
COMP
SS
GND
BST 17
10 ISN
Pin
Pin # Name
Description
LX 16
LX 15
LX 14
Heatsink Pad 3
Connect to V INP
Pin 29
11 ISP
12 SWN
13 VINP
1-4
PGND Ground connection for the synchronous rectifier.
5, 9,
19, 20
6
GND
VFB
Ground Pin. The control circuitry of the IC and lower power driver are referenced to this
pin. Return separately from other ground traces to the (-) terminal of C OUT .
Feedback Voltage and Short Circuit Detection pin. It is the inverting input of the
Error Amplifier and serves as the output voltage feedback point for the Buck
Converter. The output voltage is sensed and can be adjusted through an external
resistor divider. Whenever VFB drops 0.25V below the positive reference, a short
circuit fault is detected and the IC enters hiccup mode.
7
Output of the Error Amplifier. It is internally connected to the inverting input of the
COMP PWM comparator. An optimal filter combination is chosen and connected to this
pin and either ground or VFB to stabilize the voltage mode loop.
8
0
2
3
14-16,
23-26
7
18
2
22
SS
ISN
ISP
SWN
VINP
LX
BST
VIN
UVIN
VCC
Soft Start. Connect an external capacitor between SS and GND to set the soft start
rate based on the 10μA source current. The SS pin is held low via a 1mA (min)
current during all fault conditions.
Current sense negative input. Rail-to-rail input for overcurrent detection.
Current sense positive input. Rail-to-rail input for overcurrent detection.
Lower supply rail for the GH high-side gate driver. Connect this pin to the switching
node as close as possible to pins 23- 27. Do not connect this pin to pins 14 – 16.
Input connection to the high side N-channel MOSFET.
Connect an inductor between this pin and V OUT.
High side driver supply pin. Connect BST to the external boost diode and capacitor
as shown in the Typical Application Circuit on page 1. The high side driver is
connected between BST pin and SWN pin.
V IN connection for internal LDO and PWM Controller.
UVLO input for V IN voltage. Connect a resistor divider between V IN and UVIN
to set minimum operating voltage. Use resistor values below 20k? to override
internal resistor divider.
Output of internal regulator. May be exterinally biased if Vin < 5V.
Mar -07 Rev N
SP766 Wide Input Voltage Range 3A, 600kHz Buck Regulator
5
? 2007 Sipex Corporation
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SP7661ERL/TR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Wide Input Voltage Range 3A, 600kHz, Buck Regulator |
| SP7661ER-L/TR | 功能描述:开关变换器、稳压器与控制器 WIDE INPUT VOLTAGE Range A600KHz RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| SP7662 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP7662_07 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Wide Input Voltage Range 12A, 300kHz, Buck Regulator |
| SP7662_1 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Evaluation Board Manual |
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