参数资料
型号: LTC1515IS8-3.3/5
厂商: Linear Technology
文件页数: 4/8页
文件大小: 0K
描述: IC REG MULTI CONFIG 50MA 8SOIC
标准包装: 100
类型: 降压(降压),升压(升压),切换电容(充电泵)
输出类型: 固定
输出数: 1
输出电压: 3.3V,5V
输入电压: 2 V ~ 10 V
频率 - 开关: 650kHz
电流 - 输出: 50mA
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
LTC1515 Series
TYPICAL PERFOR M A N CE CHARACTERISTICS
100
LTC1515-X
3V Efficiency vs Input Voltage
100
LTC1515-X
3.3V Efficiency vs Input Voltage
100
LTC1515-X
5V Efficiency vs Input Voltage
80
V OUT = 3V
I OUT = 10mA
T A = 25 ° C
80
V OUT = 3.3V
I OUT = 10mA
TA = 25 ° C
80
V OUT = 5V
I OUT = 10mA
TA = 25 ° C
60
40
60
40
60
40
20
0
2
4
6
8
10
20
0
2
4
6
8
10
20
2
4
6
8
10
12
25
20
15
INPUT VOLTAGE (V)
LTC1515-X Shutdown Supply
Current vs Input Voltage
SHDN = 0V
1515 G09
V OUT
AC COUPLED
100mV/DIV
INPUT VOLTAGE (V)
LTC1515-X Step-Down Mode
5V Load Transient Response
1515 G07
V OUT
AC COUPLED
100mV/DIV
INPUT VOLTAGE (V)
LTC1515-X Step-Up Mode
5V Load Transient Response
1515 G08
10
85 ° C
I OUT
50mA/DIV
50mA
0mA
I OUT
50mA/DIV
25 ° C
5
–40 ° C
V IN = 8V, V OUT = 5V, C OUT = 10 μ F, T A = 25 ° C
1515 G10
V IN = 3.3V, V OUT = 5V, C OUT = 10 μ F, T A = 25 ° C
1515 G11
0
0
2
4
6
8
10
INPUT VOLTAGE (V)
1515 G12
PI N FU N CTIO N S
SHDN (Pin 1): Shutdown Input. A logic low on the SHDN
pin puts the part into shutdown mode. A logic high (V SHDN
≥ 1.6V) enables the part. At high V IN voltages, the SHDN
pin may still be controlled with 3V logic without causing a
large rise in V IN quiescent current. The SHDN pin may not
float; connect to V IN if unused.
POR (Pin 2): Open-Drain Power-On Reset Output. This pin
will pull low upon initial power-up, during shutdown or
until V OUT has been within 6.5% of its regulated value for
more than 200ms typ.
5/3 (LTC1515-X) (Pin 3): Output Voltage Select. A logic
high on the 5/3 pin will force V OUT to regulate to 5V. A logic
4
low will force V OUT to 3V (LTC1515-3/5) or 3.3V (LTC1515-
3.3/5). As with the SHDN pin, the 5/3 pin may be driven with
3V logic over the entire V IN range. The 5/3 pin may not float.
FB (LTC1515) (Pin 3): Feedback Input. The voltage on this
pin is compared to the internal reference voltage (1.232V)
to keep the output in regulation. An external resistor divider
is required between V OUT and FB to adjust the output
voltage. Total divider resistance should not exceed 2M.
GND (Pin 4): Ground. Should be tied to a ground plane for
best performance.
C1 – (Pin 5): Charge Pump Flying Capacitor, Negative
Terminal.
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