LTC1530CS8 Linear Technology, LTC1530CS8 Datasheet

IC SW REG CNTRLR SYNC ADJ 8-SOIC

LTC1530CS8

Manufacturer Part Number
LTC1530CS8
Description
IC SW REG CNTRLR SYNC ADJ 8-SOIC
Manufacturer
Linear Technology
Type
Step-Down (Buck)r
Datasheet

Specifications of LTC1530CS8

Internal Switch(s)
No
Synchronous Rectifier
Yes
Number Of Outputs
1
Voltage - Output
1.3 ~ 3.5 V
Current - Output
20A
Frequency - Switching
300kHz
Voltage - Input
3.3V, 5V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Power - Output
-

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FEATURES
TYPICAL APPLICATIO
APPLICATIO S
0.022 F
High Power Buck Converter from 5V or 3.3V Input
Adjustable Current Limit in S0-8 with
Topside FET R
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; 45 A in Shutdown
Power Supply for Pentium
ALPHA and PA-RISC Microprocessors
High Power 5V to 1.3V-3.5V Regulators
150pF
10k
2.7k
I
COMP
MAX
LTC1530-3.3
DS(ON)
PV
GND
U
Figure 1. Single 5V to 3.3V Supply
CC
0.1 F
V
Sensing
OUT
G1
I
G2
FB
+
MBR0530T1 MBR0530T1
®
II, AMD-K6
10 F
20
U
0.22 F
®
-2, SPARC,
V
5V
IN
Q1
Q2
C
C
L1: COILTRONICS CTX02-13198
Q1, Q2: SILICONIX SUD50N03-10
IN
OUT
2 H
: SANYO 10MV1200GX
OR PANASONIC ETQP6F2R5HA
L1
: AVX TPSE337M006R0100
+
+
Switching Regulator Controller
C
C
330 F
IN
4
OUT
DESCRIPTIO
7
The LTC
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 A.
The LTC1530 is specified for commercial and industrial
temperature ranges and is available in the S0-8 package.
Pentium is a registered trademark of Intel Corp.
AMD-K6 is a registered trademark of Advanced Micro Devices, Inc.
1200 F
, LTC and LT are registered trademarks of Linear Technology Corporation.
1530 F01a
V
3.3V
14A
High Power Synchronous
OUT
®
1530 is a high power synchronous switching
100
90
80
70
60
50
40
30
20
10
U
0
0
0.3
Efficiency vs Load Current
2
4
LOAD CURRENT (A)
6
8
LTC1530
10
T
A
= 25 C
12
1530 F01b
14
1530fa
1

Related parts for LTC1530CS8

LTC1530CS8 Summary of contents

Page 1

... Shutdown mode drops the LTC1530 supply cur- rent ® -2, SPARC, 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- registered trademark of Advanced Micro Devices, Inc ...

Page 2

... Consult LTC Marketing for parts specified with wider operating temperature ranges. The denotes specifications that apply over the full operating temperature = 12V unless otherwise noted. (Note CONDITIONS LTC1530CS8 (Note 4) LTC1530CS8-1.9 (Note 4) LTC1530CS8-2.5 (Note 4) LTC1530CS8-2.8 (Note 4) LTC1530CS8-3.3 (Note 4) (Note 5) CONDITIONS (Note 6) (Note 7) ...

Page 3

ELECTRICAL CHARACTERISTICS range, otherwise specifications are SYMBOL PARAMETER V Output Voltage OUT V Output Load Regulation OUT Output Line Regulation I Operating Supply Current PVCC Quiescent Current Shutdown Supply Current f Internal Oscillator Frequency OSC Oscillator Valley ...

Page 4

LTC1530 W U TYPICAL PERFOR A CE CHARACTERISTICS Efficiency vs Load Current 100 REFER TO FIGURE 0.3 ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS Error Amplifier Open-Loop Gain vs Temperature –55 –35 – 105 125 TEMPERATURE ( C) 1530 G10 I Sink Current vs Temperature MAX 300 ...

Page 6

LTC1530 CTIO S PV (Pin 1): Power Supply for G1, G2 and Logic must connect to a potential of at least 5V, generate PV using a simple charge pump IN ...

Page 7

W BLOCK DIAGRA INTERNAL OSCILLATOR I COMP 4 COMP REF HCL MHCL MONO TEST CIRCUITS 750 0 MAX COMP LTC1530-2 100pF G2 ...

Page 8

LTC1530 TEST CIRCUITS PV CC 12V + 0 3300pF LTC1530 COMP COMP G2 V GND 3300pF OUT U U APPLICATIO S I FOR ATIO OVERVIEW The LTC1530 is a voltage feedback, synchronous switch- ing ...

Page 9

U U APPLICATIO S I FOR ATIO Typically, thermal shutdown is activated if the LTC1530’s junction temperature exceeds 150 C. G1 and G2 resume switching when the junction temperature drops below 100 C. Soft-Start and Current Limit Unlike other PWM ...

Page 10

LTC1530 U U APPLICATIO S I FOR ATIO Figure 5b plots the minimum required R versus the maximum operating load current ( / function of Q1’s R LOAD RIPPLE during an intial power-up sequence (V ...

Page 11

U U APPLICATIO S I FOR ATIO In order for the current limit circuit to operate properly and to obtain a reasonably accurate current limit threshold, the I and I pins must be Kelvin sensed at Q1’s drain and MAX ...

Page 12

LTC1530 U U APPLICATIO S I FOR ATIO either with the power dissipation split up accord- ing to the duty cycle: V OUT OUT OUT ...

Page 13

U U APPLICATIO S I FOR ATIO Table 1. Recommended MOSFETs for LTC1530 Applications MANUFACTURER PART NO. Siliconix SUD50N03-10 Siliconix Si4410DY ON Semiconductor MTD20N03HDL Fairchild FDS6680 ON Semiconductor MTB75N03HDL* IR IRL3103S IR IRLZ44 Fuji 2SK1388 Note: Please refer to the ...

Page 14

LTC1530 U U APPLICATIO S I FOR ATIO circuits not employing the current limit function, the current in the inductor may rise above this maximum under short circuit or fault conditions; the inductor should be sized accordingly to withstand this ...

Page 15

U U APPLICATIO S I FOR ATIO OUT The ESR of the output capacitor and the output capacitor value form a zero at the frequency ESR 2 ESR C OUT The ...

Page 16

LTC1530 U U APPLICATIO S I FOR ATIO Table 3. Suggested Compensation Network for a 5V Input Application Using Multiple Paralleled 1500 F SANYO MV-GX Output Capacitors for 2.5V Output ...

Page 17

U U APPLICATIO S I FOR ATIO 0 12V (SEE TABLE) * SILICONIX SUD50N03- SANYO 10MV1200GX OR 3 SANYO OS-CON 6SH330K DEVICE LTC1530-3.3 LTC1530-3.3 ...

Page 18

LTC1530 U TYPICAL APPLICATIO (SEE TABLE) * SILICONIX SUD50N03- SANYO 10MV1200GX OR 3 SANYO OS-CON 6SH330K DEVICE LTC1530-3.3 LTC1530-3.3 LTC1530-2.8 LTC1530-2.8 LTC1530-2.5 LTC1530-2.5 LTC1530-1.9 LTC1530-1 Dual Output (3.3V and 12V) ...

Page 19

U TYPICAL APPLICATIO MBRS120 D1 MBRS120 2. 100pF 13k C C 0.022 F Other Methods to Generate 3. 3.3V 3000pF 33k LTC1530 ...

Page 20

LTC1530 U TYPICAL APPLICATIO 3.3V C3 C10 16V 16V R2 C11 47k 470 FMMD914 + 16V 16V 1 F 16V 1 5 – ...

Page 21

U TYPICAL APPLICATIO MAX 0 LTC1530-ADJ COMP SENSE GND 4.7k 1000pF C ...

Page 22

LTC1530 U TYPICAL APPLICATIO MBR0520 4 SHDN SW LT1317 R6 2. GND R7 3000pF 300k 4 ...

Page 23

... MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 24

... High Current Synchronous Step-Down Controller IN LTC3778 Low V , Optional R OUT SENSE LTC3832 High Power, Low V Step-Down Controller IN Burst Mode is a registered trademark of Linear Technology Corporation Linear Technology Corporation 24 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 GND R8 MBRS130 MBRS130 4.7 R SENSE 0 ...

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