Pin description (continued) – Rainbow Electronics MAX15010 User Manual

Page 11

MAX15008/MAX15010

Automotive 300mA LDO Voltage Regulators

with Tracker Output and Overvoltage Protector

______________________________________________________________________________________

Pin Description (continued)

PIN

MAX15008

MAX15010

NAME

FUNCTION

FB_LDO

LDO Voltage Feedback Input. Connect FB_LDO to SGND to select the preset +5V
output voltage. Connect FB_LDO to an external resistive voltage-divider for adjustable
output operation. See the Setting the Output Voltage section.

EN_LDO

Active-High LDO Enable Input. Connect EN_LDO to IN or to a logic-high voltage to turn
on the regulator. To place the LDO in shutdown, pull EN_LDO low or leave unconnected
and leave HOLD unconnected. EN_LDO is internally pulled to SGND through a 1µA
current sink. See the Control Logic section.

EN_TRK

Active-High Tracker Enable Input. Connect EN_TRK to IN or to a logic-high voltage to
turn on the tracker. Pull EN_TRK low or leave unconnected to place tracker in
shutdown. EN_TRK is internally pulled to SGND through a 1µA current sink.

—

EN_PROT

Protector Enable Input. Drive EN_PROT low to force GATE low and turn off the external
n-channel MOSFET. EN_PROT is internally pulled to SGND by a 1µA sink. Connect
EN_PROT to IN for normal operation.

19, 20

Regulator Input. Bypass IN to SGND with a 10µF capacitor (ESR

≤ 1.5Ω).

21, 22

OUT_LDO

LDO Regulator Output. Bypass OUT_LDO to SGND with a low-ESR capacitor with a
minimum value of 22µF. Fixed +5V or adjustable output (+1.8V to +11V). See the
Setting the Output Voltage section.

HOLD

Active-Low Hold Input. If EN_LDO is high when HOLD is forced low, the regulator
latches the state of the EN_LDO input and allows the regulator to remain turned on
when EN_LDO is subsequently pulled low. To shut down the regulator, release HOLD
after EN_LDO is pulled low. If HOLD functionality is unused, connect HOLD to
OUT_LDO or leave unconnected. HOLD is internally pulled up to OUT_LDO through a
0.6µA current source. See the Control Logic section.

FB_TRK

Tracker Amplifier Feedback. Connect FB_TRK directly to OUT_TRK or through an
external resistive voltage-divider.

TRACK

Tracker Input. Bypass TRACK to the SGND with a 3.3µF ceramic capacitor.

Exposed Pad. Connect EP to SGND plane. EP also functions as a heatsink to maximize
thermal dissipation. Do not use as the main ground connection.