EEWORLDEEWORLDEEWORLD

Part Number

Search

LTC1159_15

Description
High Efficiency Synchronous Step-Down Switching Regulators
File Size278KB,20 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Compare View All

LTC1159_15 Overview

High Efficiency Synchronous Step-Down Switching Regulators

LTC1159
LTC1159-3.3/LTC1159-5
High Efficiency Synchronous
Step-Down Switching Regulators
FEATURES
s
s
s
s
s
DESCRIPTIO
s
s
s
s
s
Operation from 4V to 40V Input Voltage
Ultrahigh Efficiency: Up to 95%
20
µ
A Supply Current in Shutdown
High Efficiency Maintained Over Wide Current Range
Current Mode Operation for Excellent Line and Load
Transient Response
Very Low Dropout Operation: 100% Duty Cycle
Short-Circuit Protection
Synchronous FET Switching for High Efficiency
Adaptive Non-Overlap Gate Drives
Available in SSOP and SO Packages
The LTC
®
1159 series is a family of synchronous step-down
switching regulator controllers featuring automatic Burst
Mode
TM
operation to maintain high efficiencies at low
output currents. These devices drive external complemen-
tary power MOSFETs at switching frequencies up to 250kHz
using a constant off-time current-mode architecture.
A separate pin and on-board switch allow the MOSFET
driver power to be derived from the regulated output
voltage providing significant efficiency improvement when
operating at high input voltages. The constant off-time
current-mode architecture maintains constant ripple cur-
rent in the inductor and provides excellent line and load
transient response. The output current level is user pro-
grammable via an external current sense resistor.
The LTC1159 automatically switches to power saving
Burst Mode operation when load current drops below
approximately 15% of maximum current. Standby current
is only 300µA while still regulating the output and shut-
down current is a low 20µA.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
s
s
s
Step-Down and Inverting Regulators
Notebook and Palmtop Computers
Portable Instruments
Battery-Operated Digital Devices
Industrial Power Distribution
Avionics Systems
Telecom Power Supplies
TYPICAL APPLICATIO
V
IN
CAP
0.15µF
V
IN
+
1N4148
P-GATE
0.1µF
P-DRIVE
EXTV
CC
LTC1159-5
0V = NORMAL
>2V = SHUTDOWN
3300pF
1k
C
T
300pF
SHDN1
SHDN2
I
TH
C
T
S-GND
SENSE
+
Si9435DY
C
IN
100µF
100V
+
3.3µF
V
CC
V
CC
EFFICIENCY (%)
D1
MBRS140T3
L*
33µH
3
R
SENSE
1
0.05Ω
2
4
V
OUT
5V/2A
SENSE
N-GATE
P-GND
0.01µF
+
Si9410DY
C
OUT
220µF
60
0.02
LTC1159 • F01
*COILTRONICS CTX33-4-MP
Figure 1. High Efficiency Step-Down Regulator
U
LTC1159-5 Efficiency
100
FIGURE 1 CIRCUIT
V
IN
= 10V
90
V
IN
= 20V
80
70
0.2
LOAD CURRENT (A)
2
LTC1159 • TA01
U
U
1

LTC1159_15 Related Products

LTC1159_15 LTC1159-5_15 LTC1159-3.3_15
Description High Efficiency Synchronous Step-Down Switching Regulators High Efficiency Synchronous Step-Down Switching Regulators High Efficiency Synchronous Step-Down Switching Regulators
Discussion on the development confusion and practical operation problems of small engineering companies (Part 4)
IV. Quotation Management 1. Design process technology conducts scheme design and confirms the requirements of the required equipment. According to the information provided by the technology, the relev...
john_wang Industrial Control Electronics
How to minimize the power consumption of tms570?
I urgently need to reduce the overall power consumption of tms570ls1224. The MCU basically has only the minimum system and a few button inputs. The following are my frequency reduction measures: 1) Th...
qizheng Microcontroller MCU
Ask for help from PCB proofing manufacturers
I'm a new member, please help me recommend a few good PCB proofing manufacturers, preferably those with good quality and low price, :) Thank you very much!!!...
wl3962125 PCB Design
High-resolution spaceborne SAR based on multi-channel antennas
The method of realizing high-resolution spaceborne SAR based on multi-channel antennas was studied in depth, the echo signal model of three-channel antenna SAR was established, and an echo processing ...
JasonYoo Embedded System
NXP high-speed, low-power ARM Cortex-M3 microcontroller - LPC1700
[Question: zyw] Are the output edge and center modes of the PWM fixed or selectable?[Answer: George] It is a choice. [2009-6-18 10:25:07][Question: ningzb] Hello, we are working on a power system devi...
zhaojun_xf NXP MCU
About AD9822
I would like to ask an expert. I am currently working on a CCD acquisition system. The data is converted through AD9822. There are three pins in AD9822: SDATA, SCLK, and SLOAD. The instructions say th...
polestar707 Embedded System

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 2050  521  2448  2022  519  42  11  50  41  22 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号