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参数资料
| 型号： | LTC3388IMSE-3#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 50MA 10MSOP |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 2.8V，3V，3.3V，5V |
| 输入电压： | 2.7 V ~ 20 V |
| 电流 - 输出： | 50mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-MSOP 裸露焊盘 |
LTC3388-1/LTC3388-3
20V High Efficiency
Nanopower
Step-Down Regulator
FEATURES
DESCRIPTION
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720nA Input I Q in Regulation (No Load), V IN = 4V
820nA Input I Q in Regulation (No Load), V IN = 20V
400nA Input I Q in UVLO
2.7V to 20V Input Operating Range
Up to 50mA of Output Current
Pin Selectable Output Voltages:
1.2V, 1.5V, 1.8V, 2.5V (LTC3388-1)
2.8V, 3.0V, 3.3V, 5.0V (LTC3388-3)
High Efficiency Hysteretic Synchronous
DC/DC Conversion
Standby Mode Disables Buck Switching
Available in 10-Lead MSE and 3mm × 3mm
DFN Packages
The LTC ? 3388-1/LTC3388-3 are high efficiency step-down
DC/DC converters with internal high side and synchronous
power switches that draw only 720nA typical DC sup-
ply current at no load while maintaining output voltage
regulation.
Capable of supplying 50mA of load current, the LTC3388-1/
LTC3388-3 also incorporate an accurate undervoltage lock-
out (UVLO) feature to disable the converter and maintain
a low quiescent current state when the input voltage falls
below 2.3V. In regulation, the LTC3388-1/LTC3388-3 enter
a sleep state in which both input and output quiescent cur-
rents are minimal. The buck converter turns on and off as
needed to maintain regulation. An additional standby mode
disables buck switching while the output is in regulation
APPLICATIONS
for short duration loads requiring low ripple.
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Keep Alive Power for Portable Products
Industrial Control Supplies
Distributed Power Systems
Battery-Operated Devices
Output voltages of 1.2V, 1.5V, 1.8V, 2.5V (LTC3388-1) and
2.8V, 3.0V, 3.3V, 5.0V (LTC3388-3) are pin selectable. The
LTC3388-1/LTC3388-3 can operate with V IN up to 20V while
the no load quiescent current remains below 1μA.
L , LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
TYPICAL APPLICATION
50mA Step-Down Converter
Efficiency vs Load Current
2.7V TO 20V
V IN
100
90
V OUT = 1.8V, L = 100μH
1μF
6V
LTC3388-1/
LTC3388-3
100μH
80
2.2μF
25V
4.7μF
6V
CAP
V IN2
EN
STBY
SW
V OUT
PGOOD
D0, D1
2
OUTPUT
VOLTAGE
47μF
6V
V OUT
70
60
50
40
GND
338813 TA01a
SELECT
30
20
10
V IN = 3.0V
V IN = 10V
0
1μ
10μ
100μ 1m
V IN = 20V
10m
LOAD CURRENT (A)
338813 TA01b
338813f
1
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