LTC2925_15 Datasheet, PDF (24/24 Pages) Linear Technology – Multiple Power Supply Tracking Controller with Power Good Timeout

LTC2925
TYPICAL APPLICATION
Electronic Circuit Breaker Monitors Slave Output
V_IN
0.1μF
R_ONB
138k
R_ONA
100k
V_IN
10k
V_IN
10k
R_TB1
16.5k
R_TA1
13k
R_TA2
41.2k
R_TB2
88.7k
R_TB3
86.6k
R_TA3
100k
V_CC
ON
REMOTE
STATUS
FAULT
RAMPBUF
TRACK1
TRACK2
TRACK3
Q1
Si4412ADY
C_GATE
10Ω 0.1μF
MASTER
GATE
RAMP
PGI
SD1
FB1
SUPPLY
MONITOR
RST
3.3V
RUN/SS IN
DC/DC
FB = 1.235VOUT
LTC2925
R_FA1 RFB1
35.7k 16.5k
3.3V
SD2
RUN/SS IN
DC/DC
FB2 FB = 0.8V OUT
R_FA2 R_FB2
41.2k 88.7k
3.3V
SD3
RUN/SS IN
DC/DC
FB3 FB = 0.8V OUT
R_FA3 ^RFB3
100k ^86.6k
1.8V
SLAVE1
2.5V
SLAVE2
0.015W
1.5V
SLAVE3
SENSEP
SENSEN
GND SCTMR SDTMR PGTMR
C_SCTMR
0.41μF
C_SDTMR
0.082μF
C_PGTMR
0.82μF
2925 TA03b
RELATED PARTS
PART NUMBER
LTC2900
LTC2901
LTC2902
LTC2920
LTC2921/LTC2922
LTC2923
DESCRIPTION
Quad Voltage Monitor in MSOP and DFN
Quad Voltage Monitor with Watchdog
Quad Voltage Monitor with Adjustable Reset
Power Supply Margining Controller
Power Supply Tracker with Input Monitors
Power Supply Sequencing/Tracking Controller
COMMENTS
16 User Selectable Combinations, ±1.5% Threshold Accuracy
16 User Selectable Combinations, Adjustable Timers
5%, 2.5%, 10% and 12.5% Selectable Supply Tolerances
Single or Dual, Symmetric/Asymmetric High and Low Margining
Includes Three (LTC2921) or Five (LTC2922) Remote Sense Switches
Controls Two Supplies Without FETs, MSOP-10 and DFN-12 Packages
24 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
2925fc
LT 1207 REV C • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2004