MIC33050_1205 Datasheet, PDF (2/16 Pages) Micrel Semiconductor – 4MHz Internal Inductor PWM Buck Regulator with HyperLight Load

Micrel, Inc.
Ordering Information
Part Number
MIC33050-CYHL
MIC33050-4YHL
MIC33050-GYHL
MIC33050-SYHL
MIC33050-AYHL
Voltage
1.0V
1.2V
1.8V
3.3V
ADJ
Temperature Range
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
Package
12-Pin 3mm x 3mm MLF^®
12-Pin 3mm x 3mm MLF^®
12-Pin 3mm x 3mm MLF^®
12-Pin 3mm x 3mm MLF^®
12-Pin 3mm x 3mm MLF^®
Notes:
1. Other output voltage options available. Please contact Micrel for details.
2. MLF^® is a green RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
Pin Configuration
MIC33050
Lead Finish
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
12-Pin 3mm x 3mm MLF^® (HL) Fixed Output
Top View
12-Pin 3mm x 3mm MLF^® (HL) Adjustable Output
Top View
Pin Description
Pin Number
(Fixed)
1
2
3, 4, 5, 6
7, 8
9
Pin Number
(Adj)
1
2
3, 4, 5, 6
7, 8
9
10
10
11
–
–
11
12
12
EP
EP
Pin Name
VIN
PGND
SW
OUT
EN
SNS
CFF
FB
AGND
ePad
Pin Function
Supply Voltage (Input): Requires bypass capacitor-to-GND.
Power Ground.
Switch (Output): Internal power MOSFET output switches.
Output after the internal inductor.
Enable (Input): Logic low will shut down the device, reducing the quiescent
current to less than 4µA. Do not leave floating.
Input to the error amplifier. Connect to the external resistor divider network to
see the output voltage. For fixed output voltages connect V_OUT (internal resistor
network sets the output voltage).
Feed forward capacitor connected to out sense pin.
Feedback voltage. Connect a resistor divider from output to ground to set the
output voltage.
Analog ground.
Exposed Heatsink Pad. Connect to power ground for best thermal performance.
May 2012
2
M9999-050312-C