参数资料
型号: AS1329C-BTTT
厂商: ams
文件页数: 2/20页
文件大小: 0K
描述: IC REG BOOST SYNC ADJ TSOT23-6
设计资源: Design Support Tool
标准包装: 1
类型: 升压(升压)
输出类型: 可调式
输出数: 1
输出电压: 2.5 V ~ 5 V
输入电压: 0.65 V ~ 5 V
PWM 型: 电流模式
频率 - 开关: 1.2MHz
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: SOT-23-6 细型,TSOT-23-6
包装: 标准包装
供应商设备封装: TSOT-23-6
其它名称: AS1329C-BTTTDKR
AS1329
Datasheet - P i n A s s i g n m e n t s
4 Pin Assignments
Figure 2. Pin Assignments (Top View)
SW 1
6 VIN
4.1 Pin Descriptions
Table 2. Pin Descriptions
GND 2
FB 3
AS1329
5 VOUT
4 SHDNN
Pin Number
1
2
3
4
5
6
Pin Name
SW
GND
FB
SHDNN
VOUT
VIN
Description
Switch Pin . Connect an inductor between this pin and V IN . Keep the PCB trace lengths as
short and wide as is practical to reduce EMI and voltage overshoot. If the inductor current
falls to zero, or pin SHDNN is low, an internal 100 ? anti-ringing switch is connected from this
pin to V IN to minimize EMI.
Note: An optional Schottky diode can be connected between this pin and V OUT .
Signal and Power Ground . Provide a short, direct PCB path between this pin and the
negative side of the output capacitor(s).
Feedback Pin . Feedback input to the g m error amplifier. Connect a resistor divider tap to this
pin. The output voltage can be adjusted from 2.5 to 5V by: V OUT = 1.23V[1 + (R 1 /R 2 )]
Shutdown Pin . Logic controlled shutdown input.
1 = Normal operation, 1.2MHz typical operating frequency.
0 = Shutdown; quiescent current <1μA. If SHDNN is undefined, pin SW may ring.
Note: In a typical application, SHDNN should be connected to V IN through a 1M ? pull-up
resistor.
Output Voltage Sense Input and Drain of the Internal PMOS Synchronous Rectifier .
Bias is derived from V OUT when V OUT exceeds V IN . PCB trace length from V OUT to the
output filter capacitor(s) should be as short and wide as is practical.
Input Voltage . The AS1329 gets its start-up bias from V IN unless V OUT exceeds V IN , in
which case the bias is derived from V OUT . Thus, once started, operation is completely
independent from V IN . Operation is only limited by the output power level and the internal
series resistance of the supply.
www.ams.com/DC-DC_Step-Up/AS1329
Revision 1.12
2 - 20
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