MIC26603 MICREL [Micrel Semiconductor], MIC26603 Datasheet - Page 2

• Manufacturer Part Number: MIC26603
• Description: 28V, 6A Hyper Light Load Synchronous DC/DC Buck Regulator
• Manufacturer: MICREL [Micrel Semiconductor]

Micrel, Inc.
Ordering Information
Pin Configuration
Pin Description
4, 9, 10, 11, 12
2, 5, 6, 7, 8, 21
Part Number
MIC26603YJL
July 2011
Pin Number
16,17,18,19
13,14,15,
20
1
3
Pin Name
PGND
PVDD
PVIN
Adjustable
BST
SW
NC
Voltage
5V Internal Linear Regulator (Output): PVDD supply is the power MOSFET gate drive supply voltage
and created by internal LDO from V
A 2.2µF ceramic capacitor from the PVDD pin to PGND (pin 2)
Switch Node (Output): Internal connection for the high-side MOSFET source and low-side MOSFET
drain. Due to the high speed switching on this pin, the SW pin should be routed away from sensitive
nodes.
Power Ground. PGND is the ground path for the MIC26603 buck converter power stage. The PGND
pins connect to the low-side N-Channel internal MOSFET gate drive supply ground, the sources of
the MOSFETs, the negative terminals of input capacitors, and the negative terminals of output
capacitors. The loop for the power ground should be as small as possible and separate from the
Signal ground (SGND) loop.
High-Side N-internal MOSFET Drain Connection (Input): The PV
4.5V to 26V. Input capacitors between the PVIN pins and the power ground (PGND) are required
and keep the connection short.
Boost (output): Bootstrapped voltage to the high-side N-channel MOSFET driver. A Schottky diode is
connected between the PVDD pin and the BST pin. A boost capacitor of 0.1μF is connected between
the BST pin and the SW pin. Adding a small resistor at the BST pin can slow down the turn-on time
of high-side N-Channel MOSFETs.
Pin Function
No Connect.
Switching Frequency
600kHz
28-Pin 5mm x 6mm MLF
Junction Temperature
–40°C to +125°C
IN
2
. When V
Range
®
(YJL)
IN
< +5.5V, PVDD should be tied to PVIN pins.
28-Pin 5mm × 6mm MLF
must be place next to the IC.
IN
Package
operating voltage range is from
®
M9999-071311-A
Lead Finish
MIC26603
Pb-Free