參數(shù)資料
型號(hào): LTC3406AIS5#PBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: 1.3 A SWITCHING REGULATOR, 1800 kHz SWITCHING FREQ-MAX, PDSO5
封裝: 1 MM HEIGHT, LEAD FREE, PLASTIC, MO-193, TSOT-23, 5 PIN
文件頁數(shù): 1/16頁
文件大?。?/td> 299K
代理商: LTC3406AIS5#PBF
LTC3406A
1
3406afa
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
1.5MHz, 600mA
Synchronous Step-Down
Regulator in ThinSOT
The LTC3406A is a high efciency monolithic synchro-
nous buck regulator using a constant frequency, current
mode architecture. Supply current during operation is only
20μA, dropping to ≤1μA in shutdown. The 2.5V to 5.5V
input voltage range makes the LTC3406A ideally suited
for single Li-Ion battery-powered applications. 100% duty
cycle provides low dropout operation, extending battery
runtime portable systems. Automatic Burst Mode opera-
tion increases efciency at light loads, further extending
battery runtime.
Switching frequency is internally set at 1.5MHz, allowing
the use of small surface mount inductors and capacitors.
The internal synchronous switch increases efciency
and eliminates the need for an external Schottky diode.
Low output voltages are easily supported with the 0.6V
feedback reference voltage. The LTC3406A is available in
a low prole (1mm) ThinSOT package.
Efciency vs Load Current
High Efciency: Up to 96%
Very Low Quiescent Current: Only 20A
Low Output Ripple Voltage During Burst Mode
Operation
600mA Output Current
2.5V to 5.5V Input Voltage Range
1.5MHz Constant Frequency Operation
No Schottky Diode Required
Low Dropout Operation: 100% Duty Cycle
±2% 0.6V Reference
Shutdown Mode Draw ≤1A Supply Current
Internal Soft-Start Limits Inrush Current
Current Mode Operation for Excellent Line and
Load Transient Response
Overtemperature Protected
Low Prole (1mm) ThinSOTTM Package
Cellular Telephones
Wireless and DSL Modems
Digital Still Cameras
Media Players
Portable Instruments
Point of Load Regulation
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
ThinSOT is a registered trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 5481178, 6580258.
VIN
4.7μF
CER
VIN
LTC3406A
RUN
2.2μH
22pF
619k
309k
3406A TA01
SW
VFB
GND
10μF
CER
VOUT
1.8V
600mA
OUTPUT CURRENT (mA)
30
EFFICIENCY
(%)
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3406A TA01b
0
1
VIN = 2.7V
VIN = 3.6V
VIN = 4.2V
VOUT = 1.8V
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