MIC29710/29712
Micrel
MIC29710/29712
7.5A Fast-Response LDO Regulator
General Description
Features
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.
• 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)
• No minimum load current
The MIC29710/2 is available in two versions: the three pin
fixed output MIC29710 and the five pin adjustable output
voltage MIC29712. All versions are fully protected against
overcurrent faults, reversed lead insertion, overtemperature
operation,andpositiveandnegativetransientvoltagespikes.
• 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
A TTL compatible enable (EN) control pin supports external
on/off control. If on/off control is not required, the device may
be continuously enabled by connecting EN to IN.
The MIC29710/2 is available in the standard three and five
pin TO-220 package with an operating junction temperature
range of 0°C to +125°C.
Forapplicationsrequiringevenlowerdropoutvoltageorinput
voltage greater than 16V, see the MIC29750/29752.
Ordering Information
Part Number
MIC29710-3.3BT
MIC29710-5.0BT
MIC29712BT
Temp. Range*
0°C to +125°C
0°C to +125°C
0°C to +125°C
Voltage
3.3V
Current
7.5A
Package
TO-220-3
TO-220-3
TO-220-5
5.0V
7.5A
Adj.
7.5A
* Junction Temperature
Typical Application
MIC29710
MIC29712
On
Off
VOUT
VIN
OUT
IN
VOUT
OUT
ADJ
EN
IN
R1
R2
VIN
GND
GND
R1
R2
VOUT = 1.240
1
Fixed Regulator Configuration
Adjustable Regulator Configuration
3-104
1997