MIC29710_06 Datasheet, PDF (1/11 Pages) Micrel Semiconductor – 7.5A Fast-Response LDO Regulator

MIC29710/29712
7.5A Fast-Response LDO Regulator
General Description
The MIC29710 and MIC29712 are high-current, high-accu-
racy, low-dropout voltage regulators featuring fast transient
recovery from input voltage surges and output load current
changes. These regulators use a PNP pass element that
features Micrel’s proprietary Super ßeta PNP^® process.
The MIC29710 is available in the 3-pin fixed output and
the MIC29712 is available in the 5-pin adjustable output
voltage. Both versions are fully protected against
overcurrent faults, reversed lead insertion, over-
temperature operation, and positive and negative transient
voltage spikes.
A TTL compatible enable (EN) control pin supports
external on/off control. If on/off control is not required, the
device maybe continuously enabled by connecting EN to
IN.
The MIC29710 is available in the standard 3-pin TO-220
package the MIC29712 is available in the 5-pin TO-220
package with an operating junction temperature range of
0°C to +125°C.
For applications requiring even lower dropout voltage or
input voltage greater than 16V, see the MIC29750/29752.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
• Fast transient response
• 7.5A current capability
• 700mV dropout voltage at full load
• Low ground current
• Accurate 2% guaranteed tolerance
• “Zero” current shutdown mode (MIC29712)
• Fixed voltage and adjustable versions
Applications
• Pentium^®, Pentium^® Plus, and Power PC^® processor
supplies
• High-efficiency “green” computer systems
• High-efficiency linear power supplies
• High-efficiency switching supply post regulator
• Battery-powered equipment
Typical Application
Fixed Regulator Configuration
V_OUT
= 1.240⎜⎛ ^R1 + 1⎟⎞
⎝ ^R2 ⎠
Adjustable Regulator Configuration
Super ßeta PNP is a registered trademark of Micrel, Inc. Pentium is a registered trademark of Intel Corporation.
PowerPC is a registered trademark of IBM Corporation.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
October 2006
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M9999-101906