31151 Просмотр технического описания (PDF) - Linear Technology
Номер в каталоге
Компоненты Описание
производитель
31151 Datasheet PDF : 42 Pages
| |||
LTC3115-1
Typical Application
750kHz Automotive 5V Regulator with Cold Crank Capability
CBST1
0.1µF
L1
6.8µH
CBST2
0.1µF
AUTOMOTIVE
3.6V TO 40V
CIN
10µF
BURST PWM
OFF ON
BST1 SW1
SW2 BST2
PVIN
VIN
PVOUT
5V
CO
47µF
RTOP
CFF
1A
LTC3115-1
PWM/SYNC
RUN
RFB
CFB
1000pF
1M
54.9k
VC
33pF
RFF
42.2k
FB
CIN: MURATA GRM55DR61H106K
CO: MURATA GRM43ER60J476K
D1: PANASONIC MA785
RBOT
249k
D1*
L1: SUMIDA CDRH8D43HPNP
RT
RT
47.5k
GND
PGND
PVCC
VCC
C1
4.7µF
31151 TA08a
*OPTIONAL-INSTALL D1 FOR IMPROVED EFFICIENCY AND LOWER INPUT OPERATING VOLTAGE
Cold Crank Line Transient with 1A Load
Load Dump Line Transient with 1A Load
VIN
(2V/DIV)
VOUT
(200mV/DIV)
INDUCTOR
CURRENT
(1A/DIV)
12V
15ms FALL TIME
4.5V
200ms/DIV
6V
31151 TA08b
VIN
(10V/DIV)
VOUT
(200mV/DIV)
INDUCTOR
CURRENT
(1A/DIV)
40V
13.8V
2ms/DIV
31151 TA08c
Efficiency vs Load Current
VIN = 12V
100
90
80
70
60
50
40
30
20
0.01
WITH BOOTSTRAP DIODE
WITHOUT BOOTSTRAP DIODE
0.1
1
LOAD CURRENT (A)
31151 TA08d
Related Parts
PART NUMBER DESCRIPTION
LTC3114-1
1A (IOUT), 40V Synchronous Buck-Boost DC/DC Converter
LTC3112
2.5A (IOUT), 15V Synchronous Buck-Boost DC/DC Converter
LTC3113
3A (IOUT), 2MHz Synchronous Buck-Boost DC/DC Converter
LTC3127
LTC3789
1A (IOUT), 1.2MHz Buck-Boost DC/DC Converter with
Programmable Input Current Limit
High Efficiency, Synchronous, 4-Switch Buck-Boost Controller
LTC3785
LTC3534
≤10A (IOUT), High Efficiency, 1MHz Synchronous, No RSENSE™
Buck-Boost Controller
7V, 500mA (IOUT), 1MHz Synchronous Buck-Boost DC/DC
Converter
COMMENTS
VIN = 2.2V to 40V, VOUT = 2.7V to 40V, IQ = 30µA, ISD < 3µA, DFN
and TSSOP Packages
VIN: 2.7V to 15V, VOUT : 2.5V to 14V, IQ = 40µA, ISD < 1µA, DFN and
TSSOP Packages
VIN: 1.8V to 5.5V, VOUT : 1.8V to 5.25V, IQ = 30µA, ISD < 1µA, DFN
and TSSOP Packages
96% Efficiency VIN: 1.8V to 5.5V, VOUT : 1.8V to 5.25V, IQ = 35µA,
ISD < 4µA, MSOP and DFN Packages
VIN: 4V to 38V, VOUT : 0.8V to 38V, IQ = 3mA, ISD < 60µA,
SSOP-28, QFN-28 Packages
VIN: 2.7V to 10V, VOUT : 2.7V to 10V, IQ = 86µA, ISD < 15µA,
QFN Package
94% Efficiency, VIN: 2.4V to 7V, VOUT : 1.8V to 7V, IQ = 25µA,
ISD < 1µA, DFN and GN Packages
31151fb
42 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95F0o3r m5-o7r4e1in7formation www.linear.com/LTC3115-1
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com/LTC3115-1
LT 0615 REV B • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 2012
Share Link: 