MIC2199 MICREL [Micrel Semiconductor], MIC2199 Datasheet - Page 2

• Manufacturer Part Number: MIC2199
• Manufacturer: MICREL [Micrel Semiconductor]

MIC2199
Ordering Information
Pin Configuration
Pin Description
MIC2199
Part Number
MIC2199BML
Pin Number
10
11
12
1
2
3
4
5
6
7
8
9
Voltage
Adj
Pin Name
EN/UVLO
COMP
VOUT
GND
VSW
CSH
VDD
HSD
LSD
BST
VIN
Temperature Range
FB
–40°C to +125°C
EN/UVLO
COMP
VOUT
CSH
VIN
FB
Pin Function
Compensation (Output): Internal error amplifier output. Connect to capacitor
or series RC network to compensate the regulator control loop.
Enable/Undervoltage Lockout (Input): Low-level signal powers down the
controller. Input below the 2.5V threshold disables switching and functions
as an accurate undervoltage lockout (UVLO). Input below the threshold
forces complete micropower (<0.1µA) shutdown.
Feedback (Input): Regulates FB pin to 0.8V. See
for resistor divider calculations.
Current-Sense High (Input): Current limit comparator non-inverting input. A
built-in offset of 100mV between CSH and V
current-sense resistor set the current limit threshold level. This is also the
non-inverting input to the current sense amplifier.
Current-Sense Low (Input): Output voltage feedback input and inverting
input for the current limit comparator and the current sense amplifier.
Unregulated Input (Input): +4.5V to +32V supply input.
5V Internal Linear-Regulator (Output): V
drive supply voltage and internal supply bus for the IC. Bypass to GND with
4.7µF.
Low-Side Drive (Output): High-current driver output for low-side N-Channel
MOSFET. Voltage swing is between ground and V
Ground (Return).
Boost (Input): Provides drive voltage for the high-side MOSFET driver. The
drive voltage is higher than the input voltage by V
Switch (Return): High-side MOSFET driver return.
High-Side Drive (Output): High-current driver output for high-side MOSFET.
This node voltage swing is between ground and V
4× × × × × 4 MLF-12L (ML)
1
2
3
4
5
6
12-lead 4×4 MLF™
2
Package
12
10
11
9
8
7
HSD
VSW
BST
GND
LSD
VDD
DD
is the external MOSFET gate
OUT
pins in conjunction with the
DD
“Applications Information”
IN
DD
+5V minus a diode drop.
minus a diode drop.
.
November 2004
Micrel