MC33997DW Freescale Semiconductor, MC33997DW Datasheet - Page 15

• Manufacturer Part Number: MC33997DW
• Description: IC SWITCH 3.3/5V SUPPLY 24-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MC33997DW

• Applications: Switching Power Supply, Microprocessor
• Voltage - Input: 6 ~ 26.5 V
• Number Of Outputs: 5
• Voltage - Output: 3.3V, 5V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

POWER-ON RESET TIMER
period if the V
regulation range. If the timer “times out”, then the open-drain
PWROK signal is released, indicating that “power is ON”.
SUPERVISORY CIRCUITS (PWROK) AND
(VKAMOK)
the PWROK and the VKAMOK pins. PWROK is "active high".
This output is pulled low when either of the regulator outputs
Analog Integrated Circuit Device Data
Freescale Semiconductor
This timer starts to time out at the end of the soft-start
The 33997 has two voltage monitoring open-drain outputs,
DDH
and V
DDL
outputs are in the valid
(V
regulator outputs are above their respective lower thresholds,
and the Power-On Reset Timer has expired, the output driver
is turned off and this pin is at high-impedance state (see
Figure
the keep-alive regulator output V
voltage is compared to the internal bandgap reference
voltage. When the V
voltage level, the VKAMOK signal is pulled low.
DDH
The VKAMOK signal indicates a severe fault condition on
8).
or V
DDL
) are below their regulation windows. If both
KAM
falls below the bandgap reference
FUNCTIONAL PIN DESCRIPTION
FUNCTIONAL DESCRIPTION
KAM
. The V
KAM
output
33997
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