MIC33153 Datasheet, PDF (2/17 Pages) Micrel Semiconductor – 4MHz PWM 1.2A Internal Inductor Buck Regulator with HyperLight Load and Power Good

Micrel Inc.
MIC33153
Ordering Information
Part Number¹
Marking Code
Nominal Output
Voltage
Junction Temperature
Range
Package²
MIC33153-4YHJ
MIC33153YHJ
−4
33153
MIC
33153
1.2V
Adjustable
–40°C to +125°C
–40°C to +125°C
14-pin 3.0 x 3.5 x 1.1mm MLF^®
14-pin 3.0 x 3.5 x 1.1mm MLF^®
Notes:
1. Other options available (1V - 3.3V). Contact Micrel Marketing for details.
2. MLF^® is GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
Pin Configuration
14- Pin 3.0mm x 3.5mm MLF^® (HJ)
Fixed Output Voltage
(Top View)
14- Pin 3.0mm x 3.5mm MLF^® (HJ)
Adjustable Output Voltage
(Top View)
Pin Description
Pin
Number
(Fixed)
1
2
3
4
5,6,7
8,9,10
11
12
13
14
−
Pin
Number
(Adjustable)
1
2
3
4
5,6,7
8,9,10
11
12
13
−
14
Pin
Name
SS
AGND
VIN
PGND
OUT
SW
EN
SNS
PG
NC
FB
Pin Function
Soft Start: Place a capacitor from this pin to ground to program the soft start time.
Do not leave floating, 100pF minimum C_SS is required.
Analog Ground: Connect to central ground point where all high current paths meet
(C_IN, C_OUT, PGND) for best operation.
Input Voltage: Connect a capacitor to ground to decouple the noise.
Power Ground.
Output Voltage: The output of the regulator. Connect to SNS pin. For adjustable option,
connect to feedback resistor network.
Switch: Internal power MOSFET output switches before Inductor
Enable: Logic high enables operation of the regulator. Logic low will shut down the device.
Do not leave floating.
Sense: Connect to V_OUT as close to output capacitor as possible to sense output voltage.
Power Good: Open drain output for the Power Good (PG) indicator. Use a pull up resistor
from this pin to a voltage source to detect a power good condition.
Not Internally Connected.
Feedback: Connect a resistor divider from the output to ground to set the output voltage.
September 2010
2
M9999-092910-A