参数资料
| 型号： | SP7650ER-L/TR |
| 厂商： | Exar Corporation |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 3A 26DFN |
| 标准包装： | 3,000 |
| 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 ~ 27 V |
| 输入电压： | 2.5 V ~ 28 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 300kHz |
| 电流 - 输出： | 3A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 26-VFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 26-DFN（7x4） |
| 其它名称： | SP7650ER-L/TR-ND |
Power Blox
WideInputVoltageRange3A,
300kHz, Buck Regulator
SP7650
TM
SP7650
2.5V to 28V Step Down Achieved Using Dual Input
Output Voltage down to 0.8V
3A Output Capability
Built in Low R DSON Power Switches (40 m typ)
Highly Integrated Design, Minimal Components
300 kHz Fixed Frequency Operation
UVLO Detects Both V CC and V IN
Over Temperature Protection
Short Circuit Protection with Auto-Restart
Wide BW Amp Allows Type II or III Compensation
Programmable Soft Start
Fast Transient Response
High Efficiency: Greater than 95% Possible
Asynchronous Start-Up into a Pre-Charged Output
Small 7mm x 4mm DFN Package
U.S. Patent #6,922,041
7mm SP7650
LX 26
P GND
7mm x 4mm
LX P GND 1
2 26 P GND
LX
25
LX P GND 2
BOTTOM VIEW
P GND 3
LX 23
Connect to Lx 24 GND
GND 4 5 23 LX
V FB 5 6 2 COMP
COMP 6 Connect to GND
GND
7 21 UV IN
GND 20
8 20 GND
GND 19
GND 8
19 GND
SS 9 18 BST
NC 17 10 V IN
V IN 10 Connect to V IN 17 NC
LX 16 11 V IN
V IN 11
16 LX
FEATURES
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
DFN PACKAGE
x 4mm
DFN PACKAGE
1
BOTTOM VIEW
PLX
24 Connect to Lx 3 25 GND
Heatsink Pad 1
Pin 27 4
V CC
GND 21
Heatsink Pad 2
Heatsink pad 2
UVIN 7 Connect to GND GND
Pin 28
BST 18 9 SS
Heatsink Pad 3
Heatsink pad 3
LX 15 Connect to VIN 12 V IN
V IN 12 Pin 29 15 LX
LX 14 13 V IN
V IN 13 14 LX
Now Available in Lead Free Packaging
TYPICAL APPLICATION CIRCUIT
DESCRIPTION
The SP7650 is a synchronous step-down switching regulator optimized for high efficiency. The part is designed to be
especially attractive for dual supply, 12V or 24V distributed power systems stepped down with 5V used to power the
controller. This lower V CC voltage minimizes power dissipation in the part and is used to drive the top switch. The
SP7650 is designed to provide a fully integrated buck regulator solution using a fixed 300kHz frequency, PWM voltage
mode architecture. Protection features include UVLO, thermal shutdown and output short circuit protection. The
SP7650 is available in the space saving DFN package .
U1
VIN
CF1
100pF
CZ2 RZ2
1,000pF 15k ,1%
CP1
22pF
ENABLE
CSS
47nF
1
2
3
4
5
6
7
8
9
10
11
12
13
PGND
PGND
PGND
GND
VFB
COMP
UVIN
GND
SS
VIN
VIN
VIN
VIN
SP7650
LX
LX
LX
LX
VCC
GND
GND
GND
BST
NC
LX
LX
LX
26
25
24
23
22
21
20
19
18
17
16
15
14
L1
2.2uH, Irate=4.78A
+5V VCC
CVCC
2.2uF
DBST
SD101AWS
CBST
6800pF
C3
47uF
6.3V
RZ3
7.15k ,1%
CZ3
150pF
VOUT
3.3V
0-3A
R1
68.1k ,1%
RSET
21.5k ,1%
(note 2)
12V
GND
C1
22uF
16V
fs=300Khz
Notes:
1. U1 Bottom-Side Layout should
have three contacts isolated from
one another: Vin, SWNODE and GND.
2. RSET=54.48/(Vout-0.8V)
(KOhm)
2/16/06
Date: / 5/06
WideInputInput Range3A, 3A, BuckBuck
SP7650 SP7650 Wide Voltage Voltage Range 300kHz, 300kHz, Regulator
1
? Copyright 2006 Sipex Corporation
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