参数资料
型号: LTC3532EMS#TRPBF
厂商: Linear Technology
文件页数: 6/16页
文件大小: 0K
描述: IC REG BUCK BST SYNC 0.5A 10MSOP
标准包装: 2,500
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: 2.4 V ~ 5.25 V
输入电压: 2.4 V ~ 5.5 V
PWM 型: Burst Mode?
频率 - 开关: 300kHz ~ 2MHz
电流 - 输出: 500mA
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-TFSOP,10-MSOP(0.118",3.00mm 宽)
包装: 带卷 (TR)
供应商设备封装: 10-MSOP
LTC3532
PI FU CTIO S
SHDN /SS (Pin 8): Combined Soft-Start and Shutdown.
Grounding this pin shuts down the IC. Tie to >1.5V to
enable the IC and >2.4V to ensure the error amp is not
V OUT =
1.22V ? ( R1 + R2 )
R2
clamped from soft-start. For Burst Mode operation, this pin
must be pulled up to within 0.5V of V IN . An RC from the
shutdown command signal to this pin will provide a soft-
start function by limiting the rise time of the V C pin.
FB (Pin 9): Feedback Pin. Connect resistor divider tap
here. The output voltage can be adjusted from 2.4V to
5.25V. The feedback reference is typically 1.22V. Set V OUT
according to the formula:
BLOCK DIAGRA
V C (Pin10): Error Amp Output: A frequency compensa-
tion network is connected from this pin to the FB pin to
compensate the loop. Refer to the Applications Information
section for component value selection.
Exposed Pad (Pin11): The exposed pad (DFN Package)
must be soldered to PCB ground for electrical contact and
rated thermal performance.
3
SW1
4
SW2
7
V IN
SW A
SW D
V OUT
6
GATE
DRIVERS
AND
SW B
ANTICROSS
SW C
CONDUCTION
REVERSE
AMP
+
g m = 1/60k
1A
+
PEAK CURRENT
LIMIT
+
ERROR
AMP
1.22V
FB
9
1.1A
PWM
LOGIC
PWM COMP
V C
10
1
R T
V IN
2.3V
OSC
+
UVLO
SLEEP
AUTOMATIC
Burst Mode
CONTROL AND
V C HOLD
BURST
2
8
V IN
SHDN /SS
SHUTDOWN
SOFT-START
V CC
SHUTDOWN
SS
V REF
1.22V
V REF
THERMAL
SHUTDOWN
5
GND
3532 BD
3532fc
6
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