參數(shù)資料
型號: LTC1530IS8-3.3
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: Isolated Flyback Switching Regulator with 9V Output
中文描述: SWITCHING CONTROLLER, 350 kHz SWITCHING FREQ-MAX, PDSO8
封裝: 0.150 INCH, PLASTIC, SO-8
文件頁數(shù): 1/24頁
文件大小: 288K
代理商: LTC1530IS8-3.3
1
LTC1530
High Power Synchronous
Switching Regulator Controller
The LTC
1530 is a high power synchronous switching
regulator controller optimized for 5V to 1.3V-3.5V output
applications. Its synchronous switching architecture drives
two external N-channel MOSFET devices to provide high
efficiency. The LTC1530 contains a precision trimmed
reference and feedback system that provides worst-case
output voltage regulation of
±
2% over temperature, load
current and line voltage shifts. Current limit circuitry
senses the output current through the on-resistance of
the topside N-channel MOSFET, providing an adjustable
current limit without requiring an external low value sense
resistor.
The LTC1530 includes a fixed frequency PWM oscillator
that free runs at 300kHz, providing greater than 90%
efficiency in converter designs from 1A to 20A of output
current. Shutdown mode drops the LTC1530 supply cur-
rent to 45
μ
A.
The LTC1530 is specified for commercial and industrial
temperature ranges and is available in the S0-8 package.
Figure 1. Single 5V to 3.3V Supply
LOAD CURRENT (A)
0
0.3
E
100
90
80
70
60
50
40
30
20
10
0
4
8
10
1530 F01b
2
6
12
14
T
A
= 25
°
C
Efficiency vs Load Current
I
High Power Buck Converter from 5V or 3.3V
Main Power
I
Adjustable Current Limit in S0-8 with
Topside FET R
DS(ON)
Sensing
I
No External Sense Resistor Required
I
Hiccup Mode Current Limit Protection
I
Adjustable, Fixed 1.9V, 2.5V, 2.8V and 3.3V Output
I
All N-Channel MOSFET Synchronous Driver
I
Excellent Output Regulation:
±
2% over Line, Load
and Temperature Variations
I
High Efficiency: Over 95% Possible
I
Fast Transient Response
I
Fixed 300kHz Frequency Operation
I
Internal Soft-Start Circuit
I
Quiescent Current: 1mA, 45
μ
A in Shutdown
I
Power Supply for Pentium
II, AMD-K6
-2, SPARC,
ALPHA and PA-RISC Microprocessors
I
High Power 5V to 1.3V-3.5V Regulators
+
+
2.7k
0.1
μ
F
10
μ
F
+
C
O
330
μ
F
×
7
C
**
1200
μ
F
×
4
L
O
2
μ
H
MBR0530T1 MBR0530T1
20
PV
CC
GND
LTC1530-3.3
G1
COMP
I
FB
I
MAX
G2
V
OUT
V
3.3V
14A
1530 F01a
V
IN
5V
* SILICONIX SUD50N03-10
** SANYO 10MV1200GX
COILTRONICS (561) 241-7876
R
C
10k
C
C
0.022
μ
F
0.22
μ
F
Q1*
Q2*
C1
150pF
COILTRONICS CTX02-13198
OR PANASONIC ETQP6F2R5HA
AVX TPSE337M006R0100
, LTC and LT are registered trademarks of Linear Technology Corporation.
Pentium is a registered trademark of Intel Corp.
AMD-K6 is a registered trademark of Advanced Micro Devices, Inc.
DESCRIPTIOU
FEATURES
APPLICATIU
TYPICAL APPLICATIO
U
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