参数资料
型号: LT1316IS8#PBF
厂商: Linear Technology
文件页数: 5/16页
文件大小: 0K
描述: IC REG BST FLYBK ADJ 0.5A 8SOIC
标准包装: 100
类型: 升压,反激式
输出类型: 可调式
输出数: 1
输出电压: 1.23 V ~ 30 V
输入电压: 1.5 V ~ 12 V
电流 - 输出: 500mA
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
包装: 管件
供应商设备封装: 8-SOIC
LT1316
PI N FU N CTIO N S
LBO (Pin 1): Low-Battery Detector Output. Open collector
can sink up to 500 μ A. Low-battery detector remains active
in shutdown mode.
LBI (Pin 2): Low-Battery Detector Input. When voltage at
this pin drops below 1.17V, LBO goes low.
R SET (Pin 3): A resistor between R SET and GND programs
peak switch current. The resistor value should be between
3k and 150k. Do not float or short to ground. This is a high
impedance node. Keep traces at this pin as short as
possible. Do not put capacitance at this pin.
GND (Pin 4): Ground. Connect directly to ground plane.
SW (Pin 5): Collector of NPN Power Transistor. Keep
traces at this pin as short as possible.
V IN (Pin 6): Input Supply. Must be bypassed close to the
pin.
SHDN (Pin 7): Shutdown. Ground this pin to place the part
in shutdown mode (only the low-battery detector remains
active). Tie to a voltage between 1.4V and 6V to enable the
device. SHDN pin is logic level and need only meet the
logic specification (1.4V for high, 0.4V for low).
FB (Pin 8): Feedback Pin. Reference voltage is 1.23V.
Connect resistive divider tap here. Minimize trace area at
FB. Set V OUT according to: V OUT = 1.23V(1 + R1/R2).
BLOCK DIAGRA
V IN
L1
D1
V OUT
LB0
1
6
V IN
5
SW
C1
R1
LBI 2
+
A3
1.5V
UNDERVOLTAGE
1.17V
LOCKOUT
R3 = 10R4
R4
A1
8
FB
R2
A2
V REF
1.23V
0.5V
+
A4
DRIVER
OSCILLATOR
6.3 μ s ON
2 μ s OFF
3
Q2
× 1
4
Q1
× 200
7
R SET
GND
SHDN
1316 F01
R5
Figure 1. LT1316 Block Diagram
5
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