LTC3813 Datasheet, PDF (32/32 Pages) Linear Technology – 100V Current Mode Synchronous Step-Up Controller

LTC3813
TYPICAL APPLICATION
24V Input Voltage to 50V/5A Synchronized at 250kHz
PGOOD
250kHz
CLOCK
SHDN
143k
V_OUT
R_OFF
806k
C_OFF
100pF
10k
R_UV1
140k
0.01μF
10k
C_SS
1000pF
R_UV2
10k
R_FB2
499Ω
C_C2
330pF
R_C
300k
C_C1
150pF
LTC3813
1 _IOFF
BOOST ²⁸
4 _VOFF
5 _VRNG
6 _PGOOD
7 _SYNC
8 _ITH
9
10
V_FB
PLL/LPF
TG ²⁷
SW ²⁶
SENSE^{+ 25}
SENSE^{– 21}
20
BGRTN
11
SS
12
13
SGND
SHDN
14 _UVIN
BG ¹⁹
18
DRV_CC
17
INTV_CC
EXTV_CC
16
15
NDRV
SGND
R_FB1
30.9k
R_NDRV
100k
M3
ZXMN10A07F
C_IN1
68μF
50V
DB
BAS19
C_B, 0.1μF
L1
10μH
V_IN
12V TO 40V
C_IN2
1μF
50V
PGND
C_DRVCC
0.1μF
C_VCC
1μF
M1
Si7850DP
D1
B1100
M2
Si7850
2x
C_OUT1
220μF
63V
2x
V_OUT
50V
5A
C_OUT2
10μF
100V
2x
PGND
3813 TA02
RELATED PARTS
PART NUMBER
LTC1624
DESCRIPTION
Current Mode DC/DC Controller
LTC1700
LTC1871/LTC1871-7
LTC1872/LTC1872B
LT1930
LT1931
LTC3401/LTC3402
LTC3703/LTC3703-5
LTC3704
LT3782
No R_SENSE™ Synchronous Step-Up Controller
No R_SENSE, Wide Input Range DC/DC Boost Controller
SOT-23 Boost Controller
1.2MHz, SOT-23 Boost Converter
Inverting 1.2MHz, SOT-23 Converter
1A/2A 3MHz Synchronous Boost Converters
100V Synchronous Controller
Positive-to Negative DC/DC Controller
2-Phase Step-Up DC/DC Controller
LTC3803/LTC3803-5 200kHz Flyback DC/DC Controller
LTC3814-5
60V Current Mode Synchronous Step-Up Controller
LTC3872
LTC3873
No R_SENSE Current Mode Boost DC/DC Controller
No R_SENSE Constant-Frequency Boost/Flyback/SEPIC
Controller
No R_SENSE is a trademark of Linear Technology Corporation.
32 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
COMMENTS
SO-8; 300kHz Operating Frequency; Buck, Boost, SEPIC Design;
V_IN Up to 36V
Up to 95% Efficiency, Operating as Low as 0.9V Input
No R_SENSE, Current Mode Control, 2.5V ≤ V_IN ≤ 36V
Delivers Up to 5A, 550kHz Fixed Frequency, Current Mode
Up to 34V Output, 2.6V V_IN 16V, Miniature Design
Positive-to Negative DC/DC Conversion, Miniature Design
Up to 97% Efficiency, Very Small Solution, 0.5V ≤ V_IN ≤ 5V
Step-Up or Step Down, 600kHz, SSOP-16, SSOP-28
No R_SENSE, Current Mode Control, 50kHz to 1MHz
High Power Boost with Programmable Frequency, 150kHz to 500kHz,
6V ≤ V_IN ≤ 40V
Optimized for Driving 6V MOSFETs ThinSOT
Large 1Ω Gate Drivers, No Current Sense Resistor Required
550kHz Fixed Frequency, 2.75V ≤ V_IN ≤ 9.8V
V_IN and V_OUT Limited Only by External Components
3813fb
LT 0408 REV B • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2007