LTC3786_15 Datasheet, PDF (34/34 Pages) Linear Technology – Low IQ Synchronous Boost Controller

LTC3786
Typical Application
High Efficiency 48V Boost Converter
VBIAS
SENSE⁺
LTC3786
SENSE^–
C_SS 0.1µF
C_ITH
15nF
R_ITH
8.66k
C_ITHA 220pF
PLLIN/MODE
RUN
TG
FREQ
SW
SS
BOOST
BG
ITH
INTV_CC
C_B 0.1µF
D
R_A 12.1k
VFB
R_S
475k
GND
100k
PGOOD
R_SENSE
8mΩ
L
16µH
MTOP
MBOT
C_INT
4.7µF
C_IN
6.8µF
×4
C_OUTA +
6.8µF
×4
C_IN, C_OUTA: TDK C4532X7R1H685K
C_OUTB: SANYO 63CE220KX
D: BAS170W
L: PULSE PA2050.163NL
MBOT, MTOP: RENESAS RJK0652DPB
*WHEN V_IN < 13V, MAXIMUM LOAD CURRENT AVAILABLE IS REDUCED.
V_IN
5V TO 38V
C_OUTB
220µF
V_OUT
48V
2A*
3786 TA02
Related Parts
PART NUMBER
DESCRIPTION
LTC3788/LTC3788-1 2-Phase Dual Output Synchronous Step-Up Controllers
LTC3787
2-Phase Single Output Synchronous Boost Controller
LTC3859
LTC3862/LTC3862-1
Low I_Q, Triple Output, Buck/Buck/Boost Synchronous
Controller
Multiphase Current Mode Step-Up DC/DC Controllers
LTC3813/LTC3814-5 100V/60V Maximum V_OUT Current Mode Synchronous
Step-Up DC/DC Controllers
LTC1871, LTC1871-1, Wide Input Range, No R_SENSE™ Low Quiescent Current
LTC1871-7
Flyback, Boost and SEPIC Controllers
LT^®3757/LT3758
Boost, Flyback, SEPIC and Inverting Controllers
LTC3780
High Efficiency Synchronous 4-Switch Buck-Boost DC/
DC Controller
COMMENTS
4.5V ≤ V_IN ≤ 38V, V_OUT Up to 60V, 50kHz to 900kHz, 5mm × 5mm
QFN-32 and SSOP-28 Packages
4.5V ≤ V_IN ≤ 38V, V_OUT Up to 60V, 50kHz to 900kHz, 5mm × 5mm
QFN-28 and SSOP-28 Packages
4.5V ≤ V_IN ≤ 38V, Boost Output Voltage Up to 60V, 50kHz to 900kHz,
5mm × 7mm QFN-38 and TSSOP-38 Packages
4V ≤ V_IN ≤ 36V, 5V or 10V Gate Drive, 75kHz to 500kHz, SSOP-24,
TSSOP-24, 5mm × 5mm QFN-24
No R_SENSE, Large 1Ω Gate Driver, Adjustable Off-Time, SSOP-28,
TSSOP-16
Adjustable Switching Frequency, 2.5V ≤ V_IN ≤ 36V, Burst Mode
Operation at Light Load, MSOP-10
V_IN Up to 40V/100V, 100kHz to 1MHz Programmable Operation
Frequency, 3mm × 3mm DFN-10 and MSOP-10E
4V ≤ V_IN ≤ 36V, 0.8V ≤ V_OUT ≤ 30V, SSOP-24, 5mm × 5mm QFN-32
34 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
3786fa
LT 0911 REV A • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2010