Rainbow Electronics MAX5043 - Manual (Page 14)

MAX5042/MAX5043
Two-Switch Power ICs with Integrated
Power MOSFETs and Hot-Swap Controller
14 ______________________________________________________________________________________
REG5
(5V) REG5 OK
REG9
(9V)
REF
(1.25V)
REG9 OK
REG15 OK
REG15 OK
REG5 OK
REG15
(15V)
OVT
REF OK
UVLO
1.25V
1.125V
1.2MΩ
7.5V 50kΩ
D
R
Q
7.5V
PWMNEG
7.5V
PWMNEG
5V
32µA
5V
80µA
CPWM
IFLT
"1"
OVRLD
2.3V/1.6V
CUVLO
R
S
Q
UVLO
OVT
UVLO
REFOK
REG15OK
REG9OK
REG5OK
OVRLD
R
S
Q
R
Q
T-FF
CLK SHDN
OSC
LEADING-
EDGE
DELAY
LEVEL
SHIFT
RES
QH
0.1Ω
QB
10Ω
LEADING-
EDGE
DELAY
ONE
SHOT
QL
0.1Ω
OVT
THERMAL
SHUTDOWN
+150°C
12°C HYSTERESIS
ILIM 10MHz
150mV
IAMP 200mV
HOT-SWAP
CONTROL
LOGIC
40Ω
80V, DMOS
840kΩ
35kΩ 3V 460kΩ
LEVEL SHIFT
TO PWM
HOT-SWAP SECTION
MAX5042
41
39
38
3
11
REG15
REG5
REG9
RCFF
FLTINT
4
5
6
35
13
RAMP
OPTO
CSS
PWMNEG
PWMSD
32
25
27
28
CSOUT
POSINHS
HSEN
NEGIN (29)
26
30
31
34
33
12
10
9
16
HSOK
HSGATE
HSDRAIN
CSN
CSP
SYNC
RCOSC
PWMPNEG
SRC (17, 20, 21, 24)
18
8
49
48
7
36
37
XFRMRL (19, 22, 23)
DRVIN
XFRMRH (50, 52, 53)
DRNH (51, 54, 55)
BST
DRVDEL
PPWM
46
47
UVLO
POSINPWM
GAIN = 10
PWMNEG
Figure 3. Block Diagram of the MAX5042 Power IC