LTC3815_15 Datasheet, PDF (39/42 Pages) Linear Technology – 6A Monolithic Synchronous DC/DC Step-Down Converter with Digital Power System Management

Typical Applications
LTC3815
1.2V/6A 1MHz Buck Regulator with Minimum External Components
V_IN
2.25V TO 5.5V
PGOOD
PMBus
100k 10k 10k 10k
PV_IN
V_IN
PGOOD
SCL
SDA
ALERT
PGFD
ASEL
TRACK/SS
C_SLEW
LTC3815
MODE/SYNC
RUN_MSTR
RUN_STBY
CLKOUT
MARGIN
SW
V_{CC_SENSE}
V_{SS_SENSE}
12k
0.5%
R_T
DA_OUT
PGLIM
V_FB
REF
I_TH
SGND PGND WP
C_IN: TAIYO YUDEN LMK316BJ226ML-T
C_OUT: MURATA GRM32ER60J107ME20
L: COILCRAFT XAL6030-331MEB
C_IN
22µF
PGOOD DELAY: 190ms
×2
PGOOD THRESHOLD ±10%
FREQUENCY: 1MHz
SOFT-START DELAY: 1ms
MARGIN SLEW RATE: 23%/ms
DCM MODE
PMBus ADDRESS: 0x20
0.33µH
1k
C_OUT
100µF
×2
V_OUT
1.2V
6A
10k _1nF
47pF
3815 TA02
V_IN
2.25V TO 5.5V
PGOOD
PMBus
1.2V/6A 2MHz Buck Regulator
100k 10k 10k 10k
64.9k
1%
46.4k
1%
22nF ^100pF
11.8k, 1%
59.7k
0.5%
60.4k
0.5%
PGOOD
SCL
SDA
ALERT
PGFD
PV_IN
V_IN
LTC3815
MODE/SYNC
RUN_MSTR
RUN_STBY
CLKOUT
MARGIN
ASEL
TRACK/SS
C_SLEW
RT
PGLIM
REF
SGND PGND
SW
V_{CC_SENSE}
V_{SS_SENSE}
DA_OUT
V_FB
I_TH
WP
C_IN: TAIYO YUDEN LMK316BJ226ML-T
C_OUT: MURATA GRM32ER60J107ME20
L: COILCRAFT XAL6030-181MEB
C_IN
22µF
PGOOD DELAY: 1.6ms
×2
PGOOD THRESHOLD ±20%
FREQUENCY: 2MHz
SOFT-START DELAY: 5ms
MARGIN SLEW RATE: 1%/ms
DCM MODE
PMBus ADDRESS: 0x22
0.18µH
1k
C_OUT
100µF
×2
V_OUT
1.2V
6A
10k _1nF
47pF
3815 TA03
For more information www.linear.com/LTC3815
3815p
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