MIC2584_05 Datasheet, PDF (2/28 Pages) Micrel Semiconductor – Dual-Channel Hot Swap Controller/Sequencer

MIC2584/2585
Typical Application
Micrel
V_CC1
12V
V_CC2
3.3V
/FAULT
Signal
GND
BACKPLANE PCB EDGE
CONNECTOR CONNECTOR
R6
130kΩ
1%
R7
13kΩ
1%
**BZX84Cxx
R_SENSE1
0.006Ω
1
2
Q1
Si7892DP
(PowerPAK™ SO-8)
R1
D1
10Ω
C1
0.47µF
R_SENSE2
0.020Ω
1
2
3
4
Q2
R14
Si7892DP ^10.7kΩ
(PowerPAK™ SO-8) ^1%
D2
R3
47kΩ
R2
3
10Ω
C2
0.47µF
1
VCC2
R4
22kΩ
R5
22kΩ
8 _ON
*C5
R8 ^0.047µF
30.9kΩ
1%
14 _/FAULT
12 _CDLY
21 _OV1
4
2
24
SENSE2 VCC1
MIC2585-1
C3
23 ^0.01µF
SENSE1
GATE2 ³
GATE1 ²²
5
OUT2
R11
120Ω
DIS2 ⁶
FB2 ⁷
FB1 ¹⁸
20
OUT1
DIS1 ¹⁹
C4
0.01µF
R15
4.42kΩ
1%
R10
560Ω
R9
8.06kΩ
1%
4 _OV2
CPOR GND
10
13
C6
0.02µF
PG1 ¹⁷
PG2 ¹⁶
/POR ¹⁵
CFILTER TRK
11
9
C7
0.033µF
Downstream Control Signals
Undervoltage (Output1) = 10.5V
Undervoltage (Output2) = 2.95V
Overvoltage (Input1) = 13.2V
Overvoltage (Input2) = 3.65V
START-UP Delay = 2.5ms
POR Delay = 10ms
Circuit Breaker Response Time = 16ms
*C5 (optional) is used to set the delay for V_OUT2 with respect to V_OUT1
V_OUT2 Delay = 9.5ms
**D1 is BZX84C18 and D2 is BZX84C8V2
Resistor tolerances are 5% unless specified otherwise.
C_LOAD1
330µF
V_OUT1
12V
6A
V_OUT2
3.3V
C_LOAD2 ^1.5A
330µF
R12
105kΩ
1%
R13
14.7kΩ
1%
DOWNSTREAM
CONTROLLER(S)
Figure 1. Typical Application Circuit
MIC2584/2585
2
March 2005