MIC261203 MICREL [Micrel Semiconductor], MIC261203 Datasheet - Page 3

• Manufacturer Part Number: MIC261203
• Manufacturer: MICREL [Micrel Semiconductor]

Micrel, Inc.
Pin Description (Continued)
July 2011
Pin Number
23
24
25
26
27
28
Pin Name
SGND
VDD
VIN
PG
EN
FB
Pin Function
Signal ground. SGND must be connected directly to the ground planes. Do not route the SGND pin
to the PGND Pad on the top layer, see PCB layout guidelines for details.
Feedback (Input): Input to the transconductance amplifier of the control loop. The FB pin is
regulated to 0.8V. A resistor divider connecting the feedback to the output is used to adjust the
desired output voltage.
Power Good (Output): Open Drain Output. The PG pin is externally tied with a resistor to VDD. A
high output is asserted when V
Enable (input): A logic level control of the output. The EN pin is CMOS-compatible. Logic high =
enable, logic low = shutdown. In the off state, supply current of the device is greatly reduced
(typically 5µA). The EN pin should not be left open.
Power Supply Voltage (Input): Requires bypass capacitor to SGND.
5V Internal Linear Regulator (Output): VDD supply is the supply bus for the IC control circuit. VDD
is created by internal LDO from V
ceramic capacitor from the VDD pin to SGND pins
OUT
IN
> 92% of nominal.
. When V
3
IN
< +5.5V, VDD should be tied to PVIN pins. A 1.0µF
must be place next to the IC.
M9999-071311-A
MIC261203