MIC2196_08 Datasheet, PDF (2/12 Pages) Micrel Semiconductor – 400kHz SO-8 Boost Control IC

Micrel, Inc.
Ordering Information
Part Number
MIC2196BM
MIC2196YM
Voltage
Adj.
Adj.
Frequency
400kHz
400kHz
Temperature Range
–40°C to +125°C
–40°C to +125°C
Package
8-Pin SOIC
8-Pin SOIC
MIC2196
Lead Finish
Standard
Pb-Free
Pin Configuration
COMP 1
FB 2
EN/UVLO 3
CS 4
8 VIN
7 OUTN
6 GND
5 VDD
8-Pin 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.
September 2008
2
M9999-092908