参数资料
型号: LTC3565EDD#PBF
厂商: Linear Technology
文件页数: 7/22页
文件大小: 0K
描述: IC REG BUCK SYNC ADJ 1.25A 10DFN
标准包装: 121
类型: 降压(降压)
输出类型: 可调式
输出数: 1
输出电压: 0.6 V ~ 5 V
输入电压: 2.5 V ~ 5.5 V
PWM 型: 电流模式,混合
频率 - 开关: 最高 4MHz
电流 - 输出: 1.25A
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: 10-WFDFN 裸露焊盘
包装: 管件
供应商设备封装: 10-DFN(3x3)
产品目录页面: 1335 (CN2011-ZH PDF)
LTC3565
PIN FUNCTIONS
RT (Pin 1): Timing Resistor Pin. The oscillator frequency
is programmed by connecting a resistor from this pin to
ground.
RUN (Pin 2): Converter Enable Pin. Forcing this pin above
1.5V enables this part, while forcing it below 0.3V causes
the device to shut down. In shutdown, the device draws
<1μA supply current. This pin must be driven; do not float.
SYNC/MODE (Pin 3): Combination Mode Selection and
Oscillator Synchronization Pin. This pin controls the
operation of the device. When tied to SV IN or GND, Burst
Mode operation or pulse skipping mode is selected,
respectively. If this pin is held at half of SV IN , the forced
continuous mode is selected. The oscillation frequency
can be synchronized to an external oscillator applied to
this pin. When synchronized to an external clock, pulse
skip mode is selected.
SW (Pin 4): The Switch Node Connection to the Inductor.
This pin swings from PV IN to GND.
GND (Pin 5, Exposed Pad Pin 11): Main Power Ground
Pin. Connect to the (–) terminal of C OUT , and (–) terminal
of C IN . The exposed pad must be soldered to electrical
ground on the PCB.
PV IN (Pin 6): Main Supply Pin. Must be closely decoupled
to GND.
SV IN (Pin 7): The Signal Power Pin. All active circuitry is
powered from this pin. Must be closely decoupled to GND.
SV IN must be greater than or equal to PV IN .
PGOOD (Pin 8): The Power Good Pin. This common drain
logic output is pulled to GND when the output voltage is
not within ±7% of regulation.
V FB (Pin 9): Receives the feedback voltage from the ex-
ternal resistive divider across the output. Nominal voltage
for this pin is 0.6V.
ITH (Pin 10): Error Amplifier Compensation Point. The
current comparator threshold increases with this control
voltage. Nominal voltage range for this pin is 0.4V to
1.4V.
PIN
NAME
DESCRIPTION
MIN
NOMINAL (V)
TYP
MAX
MIN
ABSOLUTE MAX (V)
MAX
1
2
RT
RUN
Timing Resistor
Enable Pin
–0.3
–0.3
0.4
SV IN
SV IN
–0.3
–0.3
SV IN + 0.3
SV IN
3
SYNC/MODE Mode Select/Synchronization Pin
0
SV IN
–0.3
SV IN + 0.3
4
SW
Switch Node
0
PV IN
–0.3
PV IN + 0.3
5
GND
Main Power Ground
0
6
7
8
PV IN
SV IN
PGOOD
Main Power Supply
Signal Power Supply
Power Good Pin
–0.3
2.5
0
5.5
5.5
SV IN
–0.3
–0.3
–0.3
6
6
SV IN + 0.3
9
10
V FB
ITH
Output Feedback Pin
Error Amplifier Compensation
0
0
0.8
1.0
1.5
–0.3
–0.3
SV IN + 0.3
SV IN + 0.3
3565fc
For more information www.linear.com/LTC3565
7
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