LTC3839 Datasheet, PDF (50/50 Pages) Linear Technology – Fast, Accurate, 2-Phase, Single-Output Step-Down DC/DC Controller

LTC3839
TYPICAL APPLICATION
4.5V to 14V Input, 0.6V/30A Output, 400kHz, R_SENSE, DTR Enabled, Step-Down Converter
V_IN
4.5V TO 14V
+ _CIN1
180μF
C_IN2
22μF
w3
2.2Ω
1μF
20Ω
20Ω
1nF
0.1μF
LTC3839
V_IN
SENSE1^–
SENSE2^–
SENSE1⁺
SENSE2⁺
20Ω
1nF _20Ω
0.1μF
V_OUT
0.6V
30A
R_S1
MT1
L1
0.002Ω ^0.22μH
+ C_OUT1
C_OUT2
100μF
330μF
w4
w4
MB1
BOOST1
TG1
DB1
2.2Ω
1μF
SW1
4.7μF
DRV_CC1
INTV_CC
BG1
BOOST2
TG2
SW2
DRV_CC2
EXTV_CC
BG2
DB2
MT2 _L2
R_S2
0.22μH _0.002Ω
MB2
PGND
V_OUTSENSE+
100k
PGOOD
0.01μF
V_{OUTSENSE–}
PGOOD
PHASMD
TRACK/SS
47pF
ITH
220pF
36.5k
MODE/PLLIN
30.1k
60.4k
DTR
40.2k
V_RNG
RT
SGND
CLKOUT
RUN
C_IN1: SANYO 16SVP180MX
C_IN2: MURATA GRM32ER61C226KE20L
C_OUT1: MURATA GRM31CR60J107ME39L
C_OUT2: SANYO 2R5TPE330M9
DB1, DB2: CENTRAL SEMI CMDSH-4ETR
L1, L2: WÜRTH 744307022
MT1, MT2: INFINEON BSC050NE2LS
MB1, MB2: INFINEON BSC010NE2LS
3839 TA02
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
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200kHz to 2MHz Operating Frequency, 4.5V ≤ V_IN ≤ 38V,
0.6V ≤ V_OUT ≤ 5.5V, , 5mm × 7mm QFN-38, TSSOP-38
200kHz to 2MHz Operating Frequency, 4.5V ≤ V_IN ≤ 38V,
1V ≤ VDDQ ≤ 2.5V, , 5mm × 7mm QFN-38, TSSOP-38
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Fast Controlled On-Time, High Frequency Synchronous
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with Diff Amp and Three-State Output Drive
Single Output 3-Channel Synchronous Step-Down DC/DC with
Diff Amp and Up to 6-phase Operation
Triple Output, Multiphase Synchronous Step-Down DC/DC
Controller, R_SENSE or DCR Current Sensing and Tracking
200kHz to 2MHz Operating Frequency, 4.5V ≤ V_IN ≤ 38V,
0.6V ≤ V_OUT ≤ 5.5V, , 3mm × 4mm QFN-20, TSSOP-20
I²C/PMBus Interface with EEPROM and 16-Bit ADC, V_IN Up to 24V,
0.5V ≤ V_OUT ≤ 5.5V, Analog Control Loop
PLL Fixed 250kHz to 750kHz Frequency, 4V ≤ V_IN ≤ 38V,
V_OUT3 Up to 12.5V
PLL Fixed Frequency 250kHz to 770kHz, 4.5V ≤ V_IN ≤ 38V,
0.8V ≤ V_OUT ≤ 12V
PLL Fixed 250kHz to 770kHz Frequency, 4.5V ≤ V_IN ≤ 38V,
0.8V ≤ V_OUT ≤ 5V
Operates with Power Blocks, DRMOS Devices or External Drivers/
MOSFETs, 3V ≤ V_IN ≤ 24V, t_ON(MIN) = 20ns
Controller Phase-Lockable Fixed 250kHz to 770kHz Frequency,
4.5V ≤ V_IN ≤ 38V, 0.8V ≤ V_OUT ≤ 5V
PLL Fixed 250kHz to 750kHz Frequency, 4V ≤ V_IN ≤ 24V,
V_OUT3 Up to 13.5V
3839fa
50 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
LT 0612 REV A • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2011