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參數(shù)資料
| 型號： | LTC3388IMSE-3#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.21 A SWITCHING REGULATOR, PDSO10 |
| 封裝： | LEAD FREE, PLASTIC, MSOP-10 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大小： | 282K |
| 代理商： | LTC3388IMSE-3#TRPBF |
LTC3388-1/LTC3388-3
1
338813f
TYPICAL APPLICATION
FEATURES
DESCRIPTION
20V High Efficiency
Nanopower
Step-Down Regulator
The LTC3388-1/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
for short duration loads requiring low ripple.
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 VINupto20Vwhile
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.
50mA Step-Down Converter
APPLICATIONS
n 720nA Input IQ in Regulation (No Load), VIN = 4V
n 820nA Input IQ in Regulation (No Load), VIN = 20V
n 400nA Input IQ in UVLO
n 2.7V to 20V Input Operating Range
n Up to 50mA of Output Current
n Pin Selectable Output Voltages:
1.2V, 1.5V, 1.8V, 2.5V (LTC3388-1)
2.8V, 3.0V, 3.3V, 5.0V (LTC3388-3)
n High Efficiency Hysteretic Synchronous
DC/DC Conversion
n Standby Mode Disables Buck Switching
n Available in 10-Lead MSE and 3mm
× 3mm
DFN Packages
n Keep Alive Power for Portable Products
n Industrial Control Supplies
n Distributed Power Systems
n Battery-Operated Devices
338813 TA01a
VIN
CAP
VIN2
EN
STBY
SW
VOUT
PGOOD
D0, D1
LTC3388-1/
LTC3388-3
GND
1μF
6V
4.7μF
6V
2.2μF
25V
2.7V TO 20V
47μF
6V
OUTPUT
VOLTAGE
SELECT
VOUT
100μH
2
Efficiency vs Load Current
LOAD CURRENT (A)
EFFICIENCY
(%)
100
40
50
30
20
80
90
70
60
10
0
338813 TA01b
100μ
1m
10m
1μ
10μ
VOUT = 1.8V, L = 100μH
VIN = 3.0V
VIN = 10V
VIN = 20V
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