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LTC1530CS8-2.5

Description
DC/DC Cntrlr Single-OUT Step Down 350kHz 8-Pin SOIC N
File Size295KB,24 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric View All

LTC1530CS8-2.5 Overview

DC/DC Cntrlr Single-OUT Step Down 350kHz 8-Pin SOIC N

LTC1530CS8-2.5 Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesNot Compliant
ECCN (US)EAR99
Part StatusUnconfirmed
HTS8542.39.00.01
SVHCYes
SVHC Exceeds ThresholdYes
Number of Outputs1
TopologyStep Down
Output Voltage (V)2.5
Maximum Switching Frequency (kHz)350
Minimum Input Voltage (V)3.5
Maximum Input Voltage (V)7
Operating Supply Voltage (V)13.2(Max)
Maximum Supply Current (mA)15(Typ)
Typical Quiescent Current (mA)1
Minimum Switching Frequency (kHz)250
Typical Switching Frequency (kHz)300
Synchronous RectifierYes
Synchronous ClockNo
Control MethodPWM
ProgrammabilityNo
Minimum Operating Temperature (°C)0
Maximum Operating Temperature (°C)70
Supplier Temperature GradeCommercial
Pin Count8
Standard Package NameSOP
Supplier PackageSOIC N
MountingSurface Mount
Package Height1.5(Max)
Package Length5(Max)
Package Width3.99(Max)
PCB changed8
Lead ShapeGull-wing
LTC1530
High Power Synchronous
Switching Regulator Controller
FEATURES
s
s
DESCRIPTIO
s
s
s
s
s
s
s
s
s
s
High Power Buck Converter from 5V or 3.3V Input
Adjustable Current Limit in S0-8 with
Topside FET R
DS(ON)
Sensing
No External Sense Resistor Required
Hiccup Mode Current Limit Protection
Adjustable, Fixed 1.9V, 2.5V, 2.8V and 3.3V Output
All N-Channel MOSFET Synchronous Driver
Excellent Output Regulation:
±2%
over Line, Load
and Temperature Variations
High Efficiency: Over 95% Possible
Fast Transient Response
Fixed 300kHz Frequency Operation
Internal Soft-Start Circuit
Quiescent Current: 1mA; 45µA in Shutdown
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 45µA.
The LTC1530 is specified for commercial and industrial
temperature ranges and is available in the S0-8 package.
, 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.
APPLICATIO S
s
s
Power Supply for Pentium
®
II, AMD-K6
®
-2, SPARC,
ALPHA and PA-RISC Microprocessors
High Power 5V to 1.3V-3.5V Regulators
TYPICAL APPLICATIO
V
IN
5V
MBR0530T1 MBR0530T1
0.1µF
100
90
2.7k
+
10µF
0.22µF
+
EFFICIENCY (%)
C
IN
1200µF
×
4
80
70
60
50
40
30
20
I
MAX
PV
CC
150pF
0.022µF
G1
20Ω
Q1
L1
2µH
10k
I
FB
COMP
LTC1530-3.3
G2
GND
V
OUT
+
Q2
C
OUT
330µF
×
7
V
OUT
3.3V
14A
1530 F01a
C
IN
: SANYO 10MV1200GX
C
OUT
: AVX TPSE337M006R0100
L1: COILTRONICS CTX02-13198
OR PANASONIC ETQP6F2R5HA
Q1, Q2: SILICONIX SUD50N03-10
10
0
0
0.3
2
8
4
10
6
LOAD CURRENT (A)
Figure 1. Single 5V to 3.3V Supply
1530fa
U
Efficiency vs Load Current
T
A
= 25°C
12
14
1530 F01b
U
U
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