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参数资料
| 型号： | SP7663ER-L/TR |
| 厂商： | Exar Corporation |
| 文件页数： | 5/18页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 6A 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： | 可调至 0.8V |
| 输入电压： | 5 V ~ 22 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 600kHz |
| 电流 - 输出： | 6A |
| 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： | 带卷 (TR) |
| 供应商设备封装： | 26-DFN（7x4） |
S P 7 6 6 3
P o w e r b l o x T M
6 A 6 0 0 K H z S y n c h r o n o u s S t e p D o w n R e g u l a t o r
PIN DESCRIPTION
Name
PGND
GND
VFB
COMP
SS
ISN
ISP
SWN
VINP
LX
BST
VIN
UVIN
VCC
Pin Number
1-4
5,9,19,20
6
7
8
10
11
12
13
14-16, 23-26
17
18
21
22
Description
Ground connection for the synchronous rectifier.
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 V FB drops 0.25V below the positive reference, a short circuit fault is detected
and the IC enters hiccup mode.
Output of the Error Amplifier. It is internally connected to the inverting input of the
PWM comparator. An optimal filter combination is chosen and connected to this pin and
either ground or V FB to stabilize the voltage mode loop.
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 over current detection.
Current sense positive input. Rail-to-rail input for over current 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 20kΩ to override internal resistor
divider.
Output of internal regulator. May be externally biased if V IN < 5V.
ORDERING INFORMATION
Part Number
SP7663ER-L
SP7663ER-L/TR
Junction
Temperature
Range
- 40°C≤T J ≤+ 125°C
- 40°C≤T J ≤+ 125°C
Marking
SP7663ER
YYWWL
X
SP7663ER
YYWWL
X
Package
26-pin DFN
26-pin DFN
Packing
Quantity
Bulk
3K/Tape & Reel
Note 1
Lead Free
Lead Free
Note 2
SP7663EB
SP7663 Evaluation Board
“YY” = Year – “WW” = Work Week – “X” = Lot Number
? 2012 Exar Corporation
5/18
Rev. 2.2.0
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