LTC3769_15 Datasheet, PDF (32/32 Pages) Linear Technology – 60V Low IQ Synchronous Boost Controller

LTC3769
Typical Application
30.1k
C_SS 0.1µF
C_ITH 15nF _{RITH 15k}
C_ITHA 100pF
R_A 12.1k
R_B
475k
VBIAS
SENSE⁺
LTC3769
EXTV_CC
OVMODE
SENSE^–
PLLIN/MODE
RUN
TG
FREQ
SW
SS
BOOST
C_B 0.1µF
BG
ITH
D
INTV_CC
100k
PGOOD
VFB
GND
100k
PGND
R_SENSE
3mΩ
L
10µH
MTOP
MBOT
C_INT
4.7µF
C_IN
4.7µF
×3
V_IN
5V TO 55V
C_OUTA +
4.7µF
×5
C_OUTB
33µF
×2
V_OUT
48V
2.5A*
V_OUT FOLLOWS V_IN
WHEN V_IN > 48V
C_IN, C_OUTA: TDK C3225X7S2A475M
C_OUTB: SUNCON 63HVH33M
D: BAS170W
L: SER2918H-103
MBOT, MTOP: BSC028N06L53
3769 F14
*WHEN V_IN < 13V, MAXIMUM LOAD CURRENT AVAILABLE IS REDUCED.
Figure 14. High Efficiency 48V/2.5A Boost Converter
Related Parts
PART NUMBER
DESCRIPTION
COMMENTS
LTC3784
2-Phase Single Output Synchronous Boost Controller 4.5V ≤ V_IN ≤ 60V, V_OUT Up to 60V, 50kHz to 900kHz, 4mm × 5mm
QFN-28 and SSOP-28 Packages
LTC3788/LTC3788-1 Multiphase, Dual Output Synchronous Step-Up
Controller
4.5V (Down to 2.5V After Start-Up) ≤ V_IN ≤ 38V, V_OUT Up to 60V, 50kHz to
900kHz Fixed Operating Frequency, 5mm × 5mm QFN-32, SSOP-28
LTC3787
2-Phase Single Output Synchronous Boost Controller 4.5V ≤ V_IN ≤ 38V, V_OUT Up to 60V, 50kHz to 900kHz, 4mm × 5mm
QFN-28 and SSOP-28 Packages
LTC3786
Low I_Q Synchronous Step-Up Controller
4.5V (Down to 2.5V After Start-Up) ≤ V_IN ≤ 38V, V_OUT Up to 60V, 50kHz to
900kHz Fixed Operating Frequency, 3mm × 3mm QFN-32, MSOP-16E
LTC3862/LTC3862-1/ Multiphase, Dual Channel Single Output Current
LTC3862-2
Mode Step-Up DC/DC Controller
4V ≤ V_IN ≤ 36V, 5V or 10V Gate Drive, 75kHz to 500kHz Fixed Operating
Frequency, SSOP-24, TSSOP-24, 5mm × 5mm QFN-24
LT3757/LT3758
Boost, Flyback, SEPIC and Inverting Controller
2.9V ≤ V_IN ≤ 40V/100V, 100kHz to 1MHz Fixed Operating Frequency,
3mm × 3mm DFN-10 and MSOP-10E
LTC3859AL
LTC3789
Low I_Q, Triple Output Buck/Buck/Boost Synchronous
DC/DC Controller
High Efficiency Synchronous 4-Switch Buck-Boost
DC/DC Controller
All Outputs Remain in Regulation Through Cold Crank, 4.5V (Down to
2.5V After Start-Up) ≤ V_IN ≤ 38V, V_OUT(BUCKS) Up to 24V, V_OUT(BOOST)
Up to 60V, I_Q = 28µA
4V ≤ V_IN ≤ 38V, 0.8V ≤ V_OUT ≤ 38V, 4mm × 5mm QFN-28 and SSOP-28
LT8705
80V V_IN and V_OUT Synchronous 4-Switch Buck-Boost V_IN Range: 2.8V (Need EXTV_CC > 6.4V) to 80V, V_OUT Range: 1.3V to 80V,
DC/DC Controller
Four Regulation Loops
LTC3890/LTC3890-1/ 60V, Low I_Q, Dual 2-Phase Synchronous Step-Down Phase-Lockable Fixed Frequency 50kHz to 900kHz, 4V ≤ V_IN ≤ 60V,
LTC3890-2/LTC3890-3 DC/DC Controller
0.8V ≤ V_OUT ≤ 24V, I_Q = 50μA
3769f
32 ^{Linear Technology Corporation}
1630 McCarthy Blvd., Milpitas,
[phone] ^● FAX: [phone]
C_●A_ww9_w5_.0_Flion3_re5_am-_r.7_co4_orem1_i7_{/nLfToCrm37a6ti9on}
www.linear.com/LTC3769
LT 0714 • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2014