Datasheet

MAX5938
-48V Hot-Swap Controller with V
IN
Step Immunity,
No R
SENSE
, and Overvoltage Protection
6 _______________________________________________________________________________________
INPUT VOLTAGE STEP TO
FAULT MANAGEMENT
MAX5938 toc12
4ms/div
IRFR1310
R
CB_ADJ
= 2k
Ω
R
LOAD
= 20
Ω
V
IN
50V/div
V
GATE
10V/div
V
OUT
100V/div
I
IN
2A/div
V
PGOOD
100V/div
CIRCUIT-BREAKER
THRESHOLD
OVERVOLTAGE TRANSIENT (NO FAULT)
MAX5938 toc13
4ms/div
V
GND
50V/div
V
GATE
10V/div
V
OUT
50V/div
V
PGOOD
50V/div
OVERVOLTAGE TRANSIENT TO
FAULT MANAGEMENT
MAX5938 toc14
2ms/div
V
IN
50V/div
V
GATE
10V/div
V
OUT
50V/div
V
PGOOD
50V/div
t
OVREJ
GATE TO V
EE
CLAMP VOLTAGE AT
POWER-OFF vs. GATE SINK CURRENT
MAX5938 toc15
I
SINK
(mA)
GATE-CLAMPING VOLTAGE (V)
18161412108642
0.5
1.0
1.5
2.0
2.5
3.0
0
020
V
EE
= GND = 0V
GATE TO V
EE
CLAMP VOLTAGE MOSFET
FULLY ENHANCED vs. GATE SINK CURRENT
MAX5938 toc16
I
SINK
(mA)
GATE-CLAMPING VOLTAGE (V)
181612 144 6 8 102
9
10
11
12
13
14
15
16
17
18
8
020
V
EE
= -48V, V
ON
= V
OFF
= 2V
INPUT VOLTAGE STEP EVENT (NO FAULT)
MAX5938 toc11
4ms/div
IRFR1310
R
CB_ADJ
= 2kΩ
R
LOAD
= 80Ω
V
IN
50V/div
V
GATE
10V/div
V
OUT
50V/div
I
IN
1A/div
V
PGOOD
50V/div
ALL VOLTAGES REFERENCED TO V
EE
Typical Operating Characteristics (continued)
(V
EE
= -48V, GND = 0V, V
IN
= GND - V
EE
, POL_SEL = floating, all voltages are referenced to V
EE
, unless otherwise noted. T
A
= +25°C,
unless otherwise noted.)