参数资料
型号: LT3653IDCB#TRPBF
厂商: Linear Technology
文件页数: 5/12页
文件大小: 0K
描述: IC REG BUCK ADJ 1.2A 8DFN
标准包装: 2,500
类型: 降压(降压)
输出类型: 可调式
输出数: 1
输出电压: 4.8 V ~ 6 V
输入电压: 7.5 V ~ 30 V
PWM 型: 电流模式
频率 - 开关: 1.5MHz
电流 - 输出: 1.2A
同步整流器:
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 8-WFDFN 裸露焊盘
包装: 带卷 (TR)
供应商设备封装: 8-DFN(3x2)
LT3653
TYPICAL PERFORMANCE CHARACTERISTICS
V C Current
T A = 25°C unless otherwise noted
V C Operating Range
15
2.0
10
5
0
–5
–10
–15
–20
–25
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
CURRENT LIMIT CLAMP
SWITCHING THRESHOLD
4
4.4
4.8 5.2
5.6
6
-50
-25
0 25 50 75
100
125
V OUT (V)
3653 G09
PIN FUNCTIONS
V IN (Pin 1): The V IN pin supplies current to the LT3653’s
internal regulator and the internal power switch. Locally
bypass this pin with a capacitor.
HVOK (Pin 2): The HVOK pin is a status pin which indi-
cates that the internal bias rail is present and that an input
undervoltage lockout fault, an overvoltage lockout fault or
an over temperature fault are not present.
V C (Pin 3): The V C pin is the output of the internal error
ampli?er and is internally compensated. The voltage on this
pin controls the peak switch current. Connect this pin to
the battery charger V C pin for battery tracking function.
I LIM (Pin 4): Connect a resistor to GND to program the
output current limit of the regulator. See the I LIM Resistor
section in Application Information.
V OUT (Pin 5): The V OUT pin is connected to the negative
TEMPERATURE (oC)
3653 G10
I SENSE (Pin 6): The I SENSE pin is the positive input to the
internal current sense resistor of the output current limit
circuit. The I SENSE pin is also the anode of the internal
BOOST diode.
BOOST (Pin 7): The BOOST pin provides a drive voltage,
higher than the input voltage, to the internal power switch.
The BOOST pin is internally connected to the cathode of
the BOOST diode.
SW (Pin 8): The SW pin is the output of the internal power
switch. Connect this pin to the inductor, catch diode and
boost capacitor.
Exposed Pad (Pin 9): Ground. The Exposed Pad must be
soldered to the PCB and electrically connected to ground.
Use a large ground plane and vias to optimize thermal
performance.
terminal of the internal current sense resistor of the output
current limit circuit. Maximum V OUT voltage is regulated
to 4.8V.
3653f
5
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