参数资料
型号: LTC3103EDD#PBF
厂商: Linear Technology
文件页数: 7/20页
文件大小: 0K
描述: IC REG BUCK SYNC ADJ 0.3A 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 ~ 13.8 V
输入电压: 2.5 V ~ 15 V
PWM 型: 电流模式,混合
频率 - 开关: 1.2MHz
电流 - 输出: 300mA
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)
LTC3103
PIN FUNCTIONS
V IN (Pin 1): Main Supply Pin. Decouple with a 10μF or
larger ceramic capacitor. The capacitor should be as close
to the part as possible.
SW (Pin 2): Switch Pin Connects to the Inductor. This pin
connects to the drains of the internal main and synchronous
power MOSFET switches.
BST (Pin 3): Bootstrapped Floating Supply for the High
Side Gate Drive. Connect to SW through a 22nF (minimum)
capacitor. The capacitor must be connected between BST
and SW and be located as close as possible to the part
as possible.
GND (Pin 4): Power Ground.
PGOOD (Pin 5): Open-drain output that is pulled to ground
when the feedback voltage falls 10% (typical) below the
regulation point, during a thermal shutdown event or if
the converter is disabled. The PGOOD output is valid 1ms
after the buck converter is enabled.
V CC (Pin 6): Internally Regulated Supply Rail. Internal
power rail regulated off of V IN to power control circuitry.
Decouple with a 1μF or larger ceramic capacitor placed
as close to the part as possible.
RUN (Pin 7): Run Pin Comparator Input. A voltage greater
than 0.84V will enable the IC. Tie this pin to V IN to enable
the IC or connect to an external resistor divider from V IN
to provide an accurate undervoltage lockout threshold.
60mV of hysteresis is provided internally.
FB (Pin 8): Feedback Input to Error Amplifier. The resis-
tor divider connected to this pin sets the buck converter
output voltage.
NC (Pin 9): No Connect Pin Must be Tied to GND.
MODE (Pin 10): Logic-Controlled Input to Select Mode
of Operation. Forcing this pin high commands high ef-
ficiency automatic Burst Mode operation where the buck
will automatically transition from PWM operation at heavy
load to Burst Mode operation at light loads. Forcing this
pin low commands low noise, fixed frequency, forced
continuous operation.
GND (Exposed Pad Pin 11): Backpad Ground Common.
This pad must be soldered to the PC board and connected
to the ground plane for optimal thermal performance.
3103f
7
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