参数资料
型号: LT1300CS8#TRPBF
厂商: Linear Technology
文件页数: 4/8页
文件大小: 0K
描述: IC REG BOOST 3.3V/5V 0.22A 8SOIC
标准包装: 2,500
类型: 升压(升压)
输出类型: 固定
输出数: 1
输出电压: 3.3V,5V
输入电压: 1.8 V ~ 10 V
PWM 型: Burst Mode?
电流 - 输出: 220mA
同步整流器:
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
包装: 带卷 (TR)
供应商设备封装: 8-SOIC
LT1300
PI N FU N CTIO N S
GND (Pin 1): Signal Ground.
Sel (Pin 2): Output Select. When tied to V IN or V OUT
converter regulates at 5V. When grounded converter
regulates at 3.3V.
SHDN (Pin 3): Shutdown. Pull high to effect shutdown. Tie
to ground for normal operation.
Sense (Pin 4): “Output” Pin.
I LIM (Pin 5): Float for 1A switch current limit. Tie to ground
for approximately 400mA. A resistor between I LIM and
ground sets peak current to some intermediate value (see
Figure 5).
BLOCK DIAGRA M
V IN (Pin 6): Supply Pin. Must be bypassed with a large
value electrolytic to ground. A 0.1 μ F ceramic capacitor
close to the pin may be needed in some cases.
SW (Pin 7): Switch Pin. Connect inductor and diode here.
Keep layout short and direct to minimize electronic radia-
tion.
PGND (Pin 8): Power Ground. Tie to signal ground (pin 1)
under the package. Bypass capacitor from V IN should be
tied directly to the pin.
V IN
+
C1
4
SENSE
2
V IN
L1
7
SW
D1
V OUT
+
C2
18mV
500k
A1
COMPARATOR
A2 CURRENT
COMPARATOR
OFF
+
R2
730 ?
R1
3 ?
1.25V
REFERENCE
144k
+
ENABLE OSCILLATOR
155kHZ
A3 DRIVER
Q2
1x
Q1
160x
161k
BIAS
Q3
8.5k
1
GND
2
SELECT
SHUTDOWN
3
5
I LIM
PGND
8
LT1300 F1
Figure 1.
4
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