參數(shù)資料
型號: LT3430EFE-1
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: 6.5 A SWITCHING REGULATOR, 120 kHz SWITCHING FREQ-MAX, PDSO16
封裝: 4.40 MM, PLASTIC, TSSOP-16
文件頁數(shù): 1/28頁
文件大?。?/td> 321K
代理商: LT3430EFE-1
LT3430/LT3430-1
1
34301fa
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
High Voltage, 3A,
200kHz/100kHz Step-Down
Switching Regulators
The LT3430/LT3430-1 are monolithic buck switching
regulators that accept input voltages up to 60V. A high ef-
ciency 3A, 0.1Ω switch is included on the die along with
all the necessary oscillator, control and logic circuitry. A
current mode architecture provides fast transient response
and excellent loop stability.
Special design techniques and a new high voltage process
achieve high efciency over a wide input range. Efciency
is maintained over a wide output current range by using
the output to bias the circuitry and by utilizing a supply
boost capacitor to saturate the power switch. Patented
circuitry* maintains peak switch current over the full duty
cycle range. A shutdown pin reduces supply current to
30A and a SYNC pin can be externally synchronized with
a logic level input from 228kHz to 700kHz for the LT3430
or from 125kHz to 250kHz for the LT3430-1.
The LT3430/LT3430-1 are available in a thermally enhanced
16-pin TSSOP package.
5V, 2A Buck Converter
Wide Input Range: 5.5V to 60V
3A Peak Switch Current over All Duty Cycles
Constant Switching Frequency:
200kHz (LT3430)
100kHz (LT3430-1)
0.1Ω Switch Resistance
Current Mode
Effective Supply Current: 2.5mA
Shutdown Current: 30A
1.2V Feedback Reference Voltage
Easily Synchronizable
Cycle-by-Cycle Current Limiting
Small, 16-Pin Thermally Enhanced TSSOP Package
Industrial and Automotive Power Supplies
Portable Computers
Battery Chargers
Distributed Power Systems
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
*US Patent # 6498466
Efciency vs Load Current
BOOST
VIN
30BQ060
15.4k
VOUT
5V
2A
220pF
0.022
F
*FOR INPUT VOLTAGES BELOW 7.5V, SOME RESTRICTIONS MAY APPLY
** SEE LT3430-1 CIRCUIT IN APPLICATIONS INFORMATION SECTION
LT3430**
SHDN
SYNC
SW
BIAS
FB
VC
GND
0.68
F
100
F 10V
SOLID
TANTALUM
22
H
MMSD914TI
4.99k
3430 TA01
4.7
F
100V
ON
OFF
VIN
5.5V*
TO 60V
+
3.3k
LOAD CURRENT (A)
0
EFFICIENCY
(%)
80
90
100
2.0
3430 TA02
70
60
50
0.5
1.0
1.5
2.5
VIN = 12V
VIN = 42V
VOUT = 5V
LT3430-1 L = 68
H
LT3430 L =27
H
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