参数资料
型号: LTC1735CGN#TRPBF
厂商: Linear Technology
文件页数: 8/32页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 16-SSOP
标准包装: 2,500
PWM 型: 电流模式
输出数: 1
频率 - 最大: 335kHz
占空比: 99.4%
电源电压: 4 V ~ 30 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: 0°C ~ 85°C
封装/外壳: 16-SSOP(0.154",3.90mm 宽)
包装: 带卷 (TR)
LTC1735
PI FU CTIO S
V OSENSE : Receives the feedback voltage from an external
resistive divider across the output.
SENSE – : The (–) Input to the Current Comparator.
SENSE + : The (+) Input to the Current Comparator. Built-in
offsets between SENSE – and SENSE + pins in conjunction
with R SENSE set the current trip threshold.
PGOOD (LTC1735F Only): Open-Drain Logic Output.
PGOOD is pulled to ground when the voltage on the
V OSENSE pin is not within ± 7.5% of its set point.
EXTV CC : Input to the Internal Switch Connected to INTV CC .
This switch closes and supplies V CC power whenever
EXTV CC is higher than 4.7V. See EXTV CC connection in the
Applications Information section. Do not exceed 7V on
this pin and ensure EXTV CC ≤ V IN .
PGND: Driver Power Ground. Connects to the source of
bottom N-channel MOSFET, the anode of the Schottky
diode, and the (–) terminal of C IN .
INTV CC : Output of the Internal 5.2V Regulator and EXTV CC
Switch. The driver and control circuits are powered from
this voltage. Decouple to power ground with a 1 μ F ceramic
capacitor placed directly adjacent to the IC together with a
minimum of 4.7 μ F tantalum or other low ESR capacitor.
V IN : Main Supply Pin. Must be closely decoupled to power
ground.
SW: Switch Node Connection to Inductor and Bootstrap
Capacitor. Voltage swing at this pin is from a Schottky
diode (external) voltage drop below ground to V IN .
BOOST: Supply to Topside Floating Driver. The bootstrap
capacitor is returned to this pin. Voltage swing at this pin
is from a diode drop below INTV CC to (V IN + INTV CC ).
TG: High Current Gate Drive for Top N-Channel MOSFET.
This is the output of a floating driver with a voltage swing
equal to INTV CC superimposed on the switch node voltage
SW.
BG:
High Current Gate Drive for Bottom
N-Channel MOSFET. Voltage swing at this pin is from
ground to INTV CC .
1735fc
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