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參數(shù)資料
| 型號： | LTC1430IS#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 0.150 INCH, PLASTIC, SOP-16 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 220K |
| 代理商： | LTC1430IS#TR |
1
LTC1430
High Power Step-Down
Switching Regulator Controller
The LTC
1430 is a high power, high efficiency switching
regulator controller optimized for 5V to 3.xV applications.
It includes a precision internal reference and an internal
feedback system that can provide output regulation of
±1%
over temperature, load current and line voltage shifts. The
LTC1430 uses a synchronous switching architecture with
two N-channel output devices, eliminating the need for a
high power, high cost P-channel device. Additionally, it
senses output current across the drain-source resistance
of the upper N-channel FET, providing an adjustable
current limit without an external low value sense resistor.
The LTC1430 includes a fixed frequency PWM oscillator for
low output ripple under virtually all operating conditions.
The 200kHz free-running clock frequency can be externally
adjusted from 100kHz to above 500kHz. The LTC1430
features low 350
A quiescent current, allowing greater
than 90% efficiency operation in converter designs from
1A to greater than 50A output current. Shutdown mode
drops the LTC1430 supply current to 1
A. For new
designs, refer to the LTC3830.
s
High Power 5V to 3.xV Switching Controller:
Can Exceed 10A Output
s
All N-Channel External MOSFETs
s
Constant Frequency Operation—Small Inductor
s
Excellent Output Regulation:
±1% Over Line, Load
and Temperature Variations
s
High Efficiency: Over 95% Possible
s
Fixed Frequency Operation
s
No Low Value Sense Resistor Needed
s
Outputs Can Drive External FETs with Up to
10,000pF Gate Capacitance
s
Quiescent Current: 350
A Typ, 1A in Shutdown
s
Fast Transient Response
s
Adjustable or Fixed 3.3V Output
s
Available in 8- and 16-Lead PDIP and SO Packages
, LTC and LT are registered trademarks of Linear Technology Corporation.
LOAD CURRENT (A)
40
70
100
90
80
50
60
EFFICIENCY
(%)
10
LTC1430 TA02
0.1
1
TA = 25°C
VIN = 5V
VOUT = 3.3V
Efficiency
+
CIN
220
F
×4
COUT
330
F
×6
+
L1, 2.8
H
PVCC1
VCC
FREQSET
SHDN
COMP
SS
PVCC2
PGND
GND
G1
IFB
IMAX
G2
NC
LTC1430 TA01
SHUTDOWN
FB
NC
CIN: AVX-TPSE227M010R0100
COUT: AVX-TPSE337M006R0100
L1: ETQP6F1R6SFA
M1A, M1B, M2: MOTOROLA MTD20N03HL
SENSE+
LTC1430
SENSE–
16k
100
RC
7.5k
CC
4700pF
C1
220pF
1N4148
1k
0.1
F
1
F
0.01
F
0.1
F
4.7
F
0.1
F
3.3V
10A
M1A, M1B
2 IN PARALLEL
M2
VIN 5V
Typical 5V to 3.3V, 10A Application
s
Power Supply for P6 and Pentium
Microprocessors
s
High Power 5V to 3.xV Regulators
s
Local Regulation for Dual Voltage Logic Boards
s
Low Voltage, High Current Battery Regulation
Pentium is a registered trademark of Intel Corporation.
APPLICATIO S
U
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
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