LTC3829_15 Datasheet, PDF (40/40 Pages) Linear Technology – 3-Phase, Single Output Synchronous Step-Down DC/DC Controller with Diffamp

LTC3829
TYPICAL APPLICATION
1.2V/60A Triple Phase Converter with Active Voltage Positioning, f_SW = 400kHz, R_DROOP = 1.33mΩ
4.7µF
SW3 SW2 SW1
220pF
10k
0.1µF
100k
INTV_CC
EXTV_CC
I_TEMP
BOOST1
BOOST2
BOOST3
RUN
V_IN
TG1
SW1
BG1
PGND
SENSE1⁺
SENSE1^–
I_LIM
MODE
TG2
FREQ
SW2
LTC3829 ^BG2
I_TH
TK/SS
SGND
IFAST
SENSE2⁺
SENSE2^–
20k
75Ω
20k
100Ω
DIFFOUT
AVP
ISET
V_FB
DIFFN
DIFFP
PGOOD
TG3
SW3
BG3
CLKOUT
SENSE3⁺
SENSE3^–
0.3µH _0.001Ω
V_IN
+ 22µF ^{6V TO 14V}
35V
×3
V_IN
0.3µH _0.001Ω
V_OUT
1.2V
60A
V_IN
0.3µH _0.001Ω
+
C_OUT1
330µF
4V
×6
3829 TA03
C_OUT2
100µF
6.3V
×6
RELATED PARTS
PART NUMBER
LTC3855
LTC3860
LTC3853
LTC3850/LTC3850-1
LTC3850-2
LTC3854
LTC3851/LTC3851-1
LTC3775
LTC3878
LTC3879
DESCRIPTION
COMMENTS
Dual, Multiphase, Synchronous DC/DC Step-Down Controller Phase-Lockable Fixed Frequency 250kHz to 770kHz,
with Differential Remote Sense
4.5V ≤ V_IN ≤ 38V, 0.8V ≤ V_OUT ≤ 12.5V
Dual, Multiphase Step-Down DC/DC Controller with Differential Works with DRMOS and Power Blocks for High Current
Remote Sense and Accurate Current Share
Applications
Triple Output, Multiphase Synchronous Step-Down DC/DC
Controller, R_SENSE or DCR Current Sensing and Tracking
Dual 2-Phase, High Efficiency Synchronous Step-Down DC/DC
Controller, R_SENSE or DCR Current Sensing and Tracking
Small Footprint Wide V_IN Range Synchronous Step-Down DC/
DC Controller, R_SENSE or DCR Current Sensing
No R_SENSE™ Wide V_IN Range Synchronous Step-Down DC/DC
Controller, RS_ENSE or DCR Current Sensing and Tracking
Phase-Lockable Fixed 250kHz to 750kHz Frequency,
4V ≤ V_IN ≤ 24V, V_OUT3 Up to 13.5V
Phase-Lockable Fixed 250kHz to 780kHz Frequency,
4V ≤ V_IN ≤ 30V, 0.8V ≤ V_OUT ≤ 5.25V
Fixed 400kHz Operating Frequency, 4.5V ≤ V_IN ≤ 38V,
0.8V ≤ V_OUT ≤ 5.25V, 2mm × 3mm QFN-12
Phase-Lockable Fixed 250kHz to 750kHz Frequency,
4V ≤ V_IN ≤ 38V, 0.8V ≤ V_OUT ≤ 5.25V, MSOP-16E,
3mm × 3mm QFN-16, SSOP-16
High Frequency Synchronous Voltage Mode Step-Down
DC/DC Controller
No R_SENSE Constant On-Time Synchronous Step-Down DC/DC
Controller, No R_SENSE Required
No R_SENSE Constant On-Time Synchronous Step-Down DC/DC
Controller, No R_SENSE Required
Fast Transient Response, t_ON(MIN) = 30ns, 4V ≤ V_IN ≤ 38V,
0.6V ≤ V_OUT ≤ 0.8V_IN, MSOP-16E, 3mm × 3mm QFN-16
Very Fast Transient Response, t_ON(MIN) = 43ns, 4V ≤ V_IN ≤ 38V,
0.8V ≤ V_OUT ≤ 0.9V_IN, SSOP-16
Very Fast Transient Response, t_ON(MIN) = 43ns, 4V ≤ V_IN ≤ 38V,
0.6V ≤ V_OUT ≤ 0.9V_IN, MSOP-16E, 3mm × 3mm QFN-16
40 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 950_Fo3_r5_m-7_o4_re1_i7_{nformation www.linear.com/LTC3829}
[phone] ^● FAX: [phone] ^● www.linear.com/LTC3829
3829fc
LT 1114 REV C • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2010