MIC68400 Datasheet, PDF (5/15 Pages) Micrel Semiconductor – 4A Sequencing LDO with Tracking and Ramp Control™

Micrel, Inc.
Pin Configuration
MIC68400
16-Pin 4mm × 4mm MLF^® (ML)
Fixed Voltages
16-Pin 4mm × 4mm MLF^® (ML)
Adjustable Voltages
Pin Description (Pin Numbering may change depending on layout considerations)
Pin Number
MIC68400YML
1, 2, 15, 16
3
4
5
6, 14
7, 8, Tab
9
10 (Fixed)
10 (ADJ)
11, 12, 13
Pin Name
VIN
Delay
RC
EN
NC
GND
POR
SNS
ADJ
VOUT
Pin Function
Input: Input voltage supply pin. Place a capacitor to ground to bypass the
input supply.
Delay: Capacitor to ground sets internal delay timer. Timer delays power-on
reset (POR) output at turn-on, and ramp down at turn-off.
Ramp Control: May be voltage driven for tracking applications or a capacitor
to ground will set the slew rate of output voltage during start-up.
Enable (Input): CMOS compatible input. Logic high = enable, logic low =
shutdown.
Not internally connected.
Ground.
Power-on Reset: Open-drain output device indicates when the output is in
regulation. High (open) means device is regulating within 10%. POR onset
can be delayed using a single capacitor from Delay to ground.
Output Voltage Sense Pin: Connect directly to output pin.
Adjustable regulators: Feedback input. Connect to resistor voltage divider.
Output Voltage: Output of voltage regulator. Place capacitor to ground to
bypass the output voltage. Minimum load current is 100µA. Nominal bypass
capacitor is 10µF.
September 2007
5
M9999-090607-C