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EUP7961 1A Ultra Low-Dropout Linear Regulator
DESCRIPTION
The EUP7961 is a 1A low-dropout linear regulator that provides a low voltage, high current output with a minimum of external components. It offers high precision, ultra-low dropout, and low ground current. The EUP7961 operates from an input of 2.5V to 5.5V. This regulator uses small, 1µF ceramic input capacitors and 4.7µF ceramic output capacitors to deliver 1A output current. High bandwidth provides excellent transient response. It is designed to drive digital circuits requiring low voltage at high currents (i.e., www.DataSheet4U.com PLDs, DSPs, microcontrollers, etc.). Other features include thermal and current limit protection, a logic-control shutdown mode and an error flag output that goes low when the output voltage drops 10% below nominal value. It is available in fixed output voltages of 1.5V, 1.8V, 2.5V, 3.3V and as an adjustable device with a 0.8V reference voltage. The adjustable output voltage can be set from 0.8V to 4.5V.
FEATURES
z z z z z z z z z z 1A Guaranteed Output Current 300mV Dropout Voltage at 1A Output Stable with Ceramic Capacitors ±1.8% Output Voltage Accuracy 300µA Low-Ground Pin Current 0.1µA Quiescent Current in Shutdown Mode Excellent Line and Load Regulation Thermal Shutdown and Current Limit Protection Error Flag Indication Available in SOT223, SOP-8 and SOT-89 Packages RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
z z z z LDO Linear Regulator for Low-Voltage Digital IC PC Add-In Cards High Efficiency Linear Power Supplies Post Regulator
Typical Application Circuit
Figure1.
DS7961 Ver 1.2 Dec. 2006
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EUP7961
Block Diagram
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Figure2.
Pin Configurations
Package Type Pin Configurations Package Type Pin Configurations
SOT223-3
SOT223-3 (B)
SOT-89
SOP-8
Pin Description
PIN VEN VIN GND VOUT
ERROR
SOT-223 1 2 3 -
SOT-223 (B) 3 1 2 -
SOT-89 3 2 1 -
SOP-8 1 2 5,6,7,8 3 4
DESCRIPTION Enable Input. Logic high=enable, Logic low=shutdown Input Voltage of the LDO Ground: TAB is connected to ground Output voltage of the LDO
ERROR Flag Output. Active-low indicated an output fault condition Adjustable Regulator Feedback Input. Connect to resistor voltage divider
ADJ
DS7961 Ver 1.2 Dec. 2006
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EUP7961
Ordering Information
Order Number EUP7961-15BIR1 EUP7961-18BIR1 EUP7961-25BIR1 EUP7961-33BIR1 EUP7961B-15BIR1 EUP7961B-18BIR1 EUP7961B-25BIR1
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Package Type SOT223 SOT223 SOT223 SOT223 SOT223 SOT223 SOT223 SOT223 SOT-89 SOT-89 SOT-89 SOT-89 SOP-8
Marking
Operating Temperature range -40 °C to 125°C -40 °C to 125°C -40 °C to 125°C -40 °C to 125°C -40 °C to 125°C -40 °C to 125°C -40 °C to 125°C -40 °C to 125°C -40 °C to 125°C -40 °C to 125°C -40 °C to 125°C -40 °C to 125°C -40 °C to 125°C
EUP7961B-33BIR1 EUP7961-15CIR1 EUP7961-18CIR1 EUP7961-25CIR1 EUP7961-33CIR1 EUP7961-15DIR1
EUP7961-18DIR1
SOP-8
EUP7961-25DIR1
SOP-8
EUP7961-33DIR1
SOP-8
EUP7961DIR1
SOP-8
xxxx P7961C xxxx P7961D xxxx P7961B xxxx P7961H xxxx 7961CB xxxx 7961DB xxxx 7961BB xxxx 7961HB xxxx P7961C xxxx P7961D xxxx P7961B xxxx P7961H xxxx EUP7961 C xxxx EUP7961 D xxxx EUP7961 B xxxx EUP7961 H xxxx EUP7961 A
-40 °C to 125°C
-40 °C to 125°C
-40 °C to 125°C
-40 °C to 125°C
EUP7961- ¡¼
¡¼ ¡¼ ¡¼ ¡¼ ¡¼
Lead Free Code 1: Lead Free 0: Lead Packing R: Tape & Reel Operating temperature range I: Industry Standard Package Type: B: SOT223 C: SOT89 Output Voltage
DS7961 Ver 1.2 Dec. 2006
D: SOP
3
EUP7961
Absolute Maximum Ratings
Supply Voltage VIN ---------------------------------------------------------------------- 5.5V Package Thermal Resistance SOT-223, θJA ---------------------------------------------------------------------- 115°C /W SOP-8, θJA ------------------------------------------------------------------------- 125°C /W Power Dissipation, PD@TA=25°C SOT-223 ------------------------------------------------------------------------------ 0.87W SOP-8 --------------------------------------------------------------------------------- 0.8W Junction Temperature ------------------------------------------------------------------- 150°C Storage Temperature ------------------------------------------------------ -65°C to +150°C Lead Temp -----------------------------------------------------------------------------260°C ESD Rating Human Body Model ---------------------------------------------------------------------- 2kV
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Operating Ratings
Supply Voltage VIN ---------------------------------------------------------------- 2.5 to 5.5V Enable Input Voltage -------------------------------------------------------------- 0V to 5.5V Junction Temperature ------------------------------------------------------ -40°C to +125°C
Electrical Characteristics
Limits in standard typeface are for TJ =25°C. Unless otherwise specified: VIN= VOUT(nom) +1V, IL=10mA,COUT=4.7µF
Symbol
Parameter
Output Voltage Tolerance
Conditions
VOUT+1V ≤ VIN ≤ 5.5V 10mA ≤ IL ≤ 1A VOUT+1V ≤ VIN ≤ 5..