参数资料
型号: LTC3810EUH-5#PBF
厂商: Linear Technology
文件页数: 10/38页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 32-QFN
标准包装: 73
PWM 型: 电流模式
输出数: 1
频率 - 最大: 1MHz
占空比: 99%
电源电压: 4.35 V ~ 60 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 125°C
封装/外壳: 32-WFQFN 裸露焊盘
包装: 管件
产品目录页面: 1336 (CN2011-ZH PDF)
LTC3810-5
PIN FUNCTIONS
BG (Pin 18): Bottom Gate Drive. The BG pin drives the
gate of the bottom N-channel synchronous switch MOSFET.
This pin swings from BGRTN to DRV CC .
BGRTN (Pin 19): Bottom Gate Return. This pin connects to
the source of the pulldown MOSFET in the BG driver and
is normally connected to ground. Connecting a negative
supply to this pin allows the synchronous MOSFET ’s gate
to be pulled below ground to help prevent false turn-on
during high dV/dt transitions on the SW node. See the
Applications Information section for more details.
SENSE + , SENSE – (Pin 24, Pin 20): Current Sense Com-
parator Input. The (+) input to the current comparator is
normally connected to SW unless using a sense resistor.
The (–) input is used to accurately kelvin sense the bottom
side of the sense resistor or MOSFET.
SW (Pin 25): Switch Node Connection to Inductor and
Bootstrap Capacitor. The voltage swing at this pin is –0.7V
(a Schottky diode (external) voltage drop) to V IN .
TG (Pin 26): Top Gate Drive. The TG pin drives the gate of
the top N-channel synchronous switch MOSFET. The TG
driver draws power from the BOOST pin and returns to the
SW pin, providing true floating drive to the top MOSFET.
BOOST (Pin 27): Top Gate Driver Supply. The BOOST pin
supplies power to the floating TG driver. BOOST should
be bypassed to SW with a low ESR (X5R or better) 0.1μF
capacitor. An additional fast recovery Schottky diode from
DRV CC to the BOOST pin will create a complete floating
charge-pumped supply at BOOST.
I ON (Pin 31): On-Time Current Input. Tie a resistor from V IN
to this pin to set the one-shot timer current and thereby
set the switching frequency.
SGND (Exposed Pad Pin 33): Signal Ground. All small-
signal components should connect to this ground and
eventually connect to PGND at one point.
38105fd
10
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LTC3810IG 制造商:Linear Technology 功能描述:
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