MAX5043ETN Maxim Integrated Products, MAX5043ETN Datasheet - Page 11

• Manufacturer Part Number: MAX5043ETN
• Description: Switching Converters, Regulators & Controllers Two-Switch Power IC w/Power MOSFET
• Manufacturer: Maxim Integrated Products

MAX5042
28, 29
26
27
30
31
32
33
34
35
36
37
38
39
41
46
PIN
26, 28, 29,
MAX5043
Power MOSFETs and Hot-Swap Controller
31, 35
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—
—
—
—
32
33
34
36
37
38
39
41
46
—
Two-Switch Power ICs with Integrated
HSDRAIN
PWMNEG
HSGATE
DRVDEL
CSOUT
NEGIN
REG15
NAME
PPWM
HSOK
HSEN
REG9
REG5
UVLO
CSN
CSP
Hot-Swap OK (MAX5042 Only). HSOK’s open-drain output is forced to NEGIN upon
hot-swap completion.
Hot-Swap Enable (MAX5042 Only). HSEN is the center point of the internal hot-swap
UVLO divider. Use an external voltage-divider or a 100kΩ pullup resistor to the most
positive rail to override.
Negative Supply Input (MAX5042 Only). NEGIN connects to the most negative input
supply rail. NEGIN provides the hot-swap circuit’s most negative connection. NEGIN
is at the same potential as the IC substrate.
Hot-Swap Gate (MAX5042 Only). Connect HSGATE to the gate of the external hot-
swap MOSFET.
Hot-Swap MOSFET Drain Sense (MAX5042 Only). Connect HSDRAIN to the drain of
the external hot-swap MOSFET.
Current-Sense Amplifier Output. The amplifier has a gain of 10. Connect CSOUT to
RAMP for current-mode control.
Positive Current-Sense Connection. Place the current-sense resistor as close as
possible to the device and use a Kelvin connection.
Negative Current-Sense Connection. Place the current-sense resistor as close as
possible to the device and use a Kelvin connection.
Analog Signal Return for the PWM Section
Driver Delay Adjust Connection. Connect a resistor and a 0.22µF capacitor from
DRVDEL to PWMNEG. The resistor at DRVDEL controls the skew between the
PPWM signal and the power pulse applied to the internal power MOSFETs. Use in
conjunction with a secondary-side synchronous-rectifier controller. The skew allows
for the optimization of the synchronous-rectifier drive pulse.
PWM Pulse Output. PPWM leads the internal power MOSFET pulse by an amount
determined with the resistor value at DRVDEL.
9V Internal Regulator Output. Use primarily as a source for the internal gate drivers.
Bypass REG9 to PWMNEG with a 1µF ceramic capacitor.
5V Internal Regulator Output. Bypass REG5 to PWMNEG with a 1µF ceramic
capacitor.
15V Startup Regulator Output. A voltage greater than 18V on REG15 disables the
regulator. Bypass REG15 to PWMNEG with at least one 1µF ceramic capacitor.
PWM Undervoltage Lockout. UVLO is the center point of the PWM undervoltage
lockout divider. Use an external divider or a 100kΩ pullup resistor to POSINPWM to
override. Connect the external resistor-divider network from POSINPWM to
PWMNEG.
Pin Description (continued)
FUNCTION
11