MAX15096 Datasheet, PDF (10/15 Pages) Maxim Integrated Products – Integrated Hot-Swap/Electronic

MAX15096/MAX15096A/
MAX15096D
2.7V to 18V, 6A Integrated Hot-Swap/
Electronic Circuit Breaker
Detailed Description
Enable Logic and Undervoltage/
Overvoltage-Lockout Threshold
The supply output can become active only after all the
following events have occurred:
● IN is within the UVOV window
● V_CC is above its UVLO threshold
● EN meets its enable threshold for more than 100μs
● PRSNT is low for more than 400µs
The MAX15096 devices enable the outputs as shown in
Table 1. The devices are ready to drive the output when
the V_CC supply rises above the V_UVLO threshold. The
devices turn on the output when V_CC > V_UVLO, V_UVOV
is higher than 0.55V (V_{UV_TH}) and less than 1.23V
(V_{OV_TH}). The devices turn off the output when V_UVOV
falls below (0.55V - V_{UV_HYS}) or V_UVOV rises above
1.23V. An external resistive divider from IN to UVOV and
ground provide the flexibility to select the undervoltage/
overvoltage-lockout threshold to the desired value. See
Figure 1 and the Setting the Undervoltage/Overvoltage
Threshold section in the Applications Information section.
Startup
Once the devices’ output is enabled, the device pro-
vides controlled application of power to the load. The
voltage at OUT begins to rise at approximately 10V/ms
default until the programmed circuit-breaker current level
is reached, while the devices actively limit the inrush
current at the circuit-breaker setting.An external capacitance
connected to the GATE pin allows the user to program
the slew rate to a value lower than the default. The inrush
current can be programmed by appropriate selection of
R_CB. During startup, a foldback current limit is active
to protect the internal MOSFET to operate within safe
operating area. (Figure 2).
Table 2. Output Enable Truth Table
POWER SUPPLY
V_CC UVLO
V_CC > V_UVLO
V_CC < V_UVLO
X
X
X = Don’t care.
V_{UV_TH} = 0.55V (typ).
V_{OV_TH} = 1.23V (typ).
PRECISION ANALOG INPUT
UVP
OVP
V_UVOV > V_{UV_TH}
X
V_UVOV < V_{OV_TH}
X
V_UVOV < (V_{UV_TH} - V_{UV_HYS})
X
X
V_UVOV > V_{OV_TH}
OUT
On
Off
Off
Off
IN
R1
REF1
UVOV
R2
MAX15096
MAX15096A
MAX15096D
CONTROL
LOGIC
GND ^REF2
Figure 1. Undervoltage/Overvoltage Threshold Setting
IINRUSH
3A
RCB = 42.1kΩ
0.64A
0.5A
0.1A
RCB = 10.5kΩ
2V
10V
VIN - VOUT
Figure 2. Startup Inrush Current Foldback Characteristics
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