参数资料
型号: AS1331-BTDT
厂商: ams
文件页数: 3/17页
文件大小: 0K
描述: IC REG BUCK BST SYNC ADJ 10TDFN
标准包装: 6,000
类型: 降压(降压),升压(升压)
输出类型: 可调式
输出数: 1
输出电压: 2.5 V ~ 3.3 V
输入电压: 1.8 V ~ 5.5 V
电流 - 输出: 300mA
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 10-WFDFN 裸露焊盘
包装: 带卷 (TR)
供应商设备封装: 10-TDFN(3x3)
AS1331
Datasheet - P i n A s s i g n m e n t s
4 Pin Assignments
Figure 2. Pin Assignments (Top View)
VOUT 1
SW2 2
10 FB
9 GND
Pin Descriptions
Table 1. Pin Descriptions
PGND 3
SW1 4
VIN 5
AS1331
11
8 LBO
7 LBI
6 EN
Pin
Name
VOUT
SW1
PGND
SW2
VIN
EN
LBI
LBO
GND
FB
NC
Pin
Number
1
2
3
4
5
6
7
8
9
10
11
Description
Output of the Buck/Boost Converter.
Buck/Boost Switch Pin. Connect the inductor from SW1 to SW2
Power Ground. Both GND pins must be connected.
Buck/Boost Switch Pin. Connect the inductor from SW1 to SW2. An
optional Schottky diode can be connected between this pin and VOUT to
increase efficiency.
Input Supply Pin. A minimum 2.2μF capacitor should be placed between
VIN and GND.
Enable Pin . Logic controlled shutdown input.
1 = Normal operation;
0 = Shutdown; quiescent current <1μA.
Low Battery Comperator Input . 1.25V Threshold. May not be left floating.
If connected to GND LBO is working as Output Power okay.
Low Battery Comperator Output . This open-drain output is low when the
voltage on LBI is less than 1.25V.
Ground. Both GND pins must be connected.
Feedback Pin . Feedback input for the adjustable version. Connect a
resistor divider tap to this pin. The output voltage can be adjusted from 2.5V
to 3.3V by: V OUT = 1.25V[1 + (R 1 /R 2 )]
Note: For the fixed Output Voltage Version contact this pin to V OUT .
Exposed Pad. This pad is not connected internally. It can be used for
ground connection between GND and PGND.
Revision 1.04
2 - 16
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