MIC2196 Datasheet, PDF (2/11 Pages) Micrel Semiconductor – 400kHz SO-8 Boost Control IC

MIC2196
Ordering Information
Part Number
Standard
Pb-Free
MIC2196BM MIC2196YM
Output Voltage
Adjustable
Frequency Junction Temp. Range
400KHz
–40°C to +125°C
Package
8-lead SOIC
Micrel
Pin Configuration
COMP 1
FB 2
EN/UVLO 3
CS 4
8 VIN
7 OUTN
6 GND
5 VDD
8 Lead SOIC (M)
Pin Description
Pin Number
1
2
3
4
5
6
7
8
Pin Name
COMP
FB
EN/UVLO
CS
VDD
GND
OUTN
VIN
Pin Function
Compensation (Output): Internal error amplifier output. Connect to a
capacitor or series RC network to compensate the regulator’s control loop.
Feedback (Input): Regulates FB to 1.245V.
Enable/Undervoltage Lockout (input): A low level on this pin will power down
the device, reducing the quiescent current to under 0.5µA. This pin has two
separate thresholds, below 1.5V the output switching is disabled, and below
0.9V the device is forced into a complete micropower shutdown. The 1.5V
threshold functions as an accurate undervoltage lockout (UVLO) with 100mV
hysteresis.
The (+) input to the current limit comparator. A built in offset of 100mV
between CS and GND in conjunction with the current sense resistor sets the
current limit threshold level. This is also the (+) input to the current amplifier.
3V internal linear-regulator output. VDD is also the supply voltage bus for the
chip. Bypass to GND with 1µF.
Ground.
High current drive for N channel MOSFET. Voltage swing is from ground to
VIN. R_ON is typically 3Ω @ 5V_IN.
Input voltage to the control IC. This pin also supplies power to the gate drive
circuit.
MIC2196
2
August 2004