MIC59300 Datasheet, PDF (1/15 Pages) Micrel Semiconductor – Ultra High Speed 3A LDO

MIC59300
Ultra High Speed 3A LDO
General Description
The MIC59300 is a high-bandwidth, low-dropout, 3A linear
voltage regulator ideal for powering core voltages of low-
power microprocessors. The MIC59300 implements a dual
supply configuration allowing for a very low output
impedance and a very fast transient response.
The MIC59300 requires a bias input supply and a main
input supply, allowing for ultra-low input voltages on the
main supply rail. The device operates from an input supply
of 1.0V to 3.8V and bias supply between 3V and 5.5V. The
MIC59300 offers fixed output voltages and adjustable
output voltages down to 0.5V.
The MIC59300 requires a minimum output capacitance for
stability, working optimally with small ceramic capacitors.
The MIC59300 is available in a 5-pin TO-263 and an 8-pin
EPAD SOIC package and its junction temperature range is
–40°C to +125°C.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
• Input voltage range:
– V_IN = 1.0V to 3.8V
– V_BIAS = 3.0V to 5.5V
• Stable with 1µF ceramic capacitor
• ±1% initial tolerance
• Maximum dropout voltage of 500mV over temperature
• Adjustable output voltage down to 0.5V
• Ultra fast transient response
• Excellent line and load regulation specifications
• Logic controlled shutdown option
• Thermal shutdown and current limit protection
• Junction temperature range: –40°C to +125°C
• TO-263 & 8-pin EPAD SOIC
• Pin Compatible Upgrade to MIC49300
Applications
• Telecommunications processors
• Graphics processors
• Computer peripheral cards
• Logic IC power supply
• SMPS post regulators
• Microprocessors
• Digital TV’s
_________________________________________________________________________________________________________
Typical Application
VIN
VBIAS
EN
MIC59300YME
3, 6 _VIN
VOUT ^{4, 5}
CIN=1µF
(Ceramic)
R1
2 _VBIAS
1 _EN
ADJ ⁷
CBIAS=1µF
(Ceramic)
GND EP
R2
8
9
VOUT
COUT=1µF
(Ceramic)
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
January 2009
M9999-010809-A