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EUP7910A
3.3V 600mA Low-Dropout Regulator
DESCRIPTION
The EUP7910A positive 3.3V voltage regulator features the ability to source 600mA of output current with a dropout voltage of 0.3V. A low quiescent current is provided. The typical quiescent current is 170A. Other features include ultra low dropout, high output accuracy, high PSRR, thermal shutdown and over current protection.
FEATURES
Dropout voltage 0.3V @ Io=600mA Output Current in Excess of 600mA Output Voltage Accuracy 2% Quiescent Current, Typically 170A Stable with Ceramic Capacitor Short Circuit Current Limit Over Temperature Protection Available in SOT-89 Packages RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
LDO Linear Regulator for Low-Voltage Digital IC PC Add-In Cards High Efficiency Linear Power Supplies Post Regulator
Typical Application Circuit
Figure 1.
DS7910A Ver1.0
May 2008
1
EUP7910A
Pin Configurations
Package Type Pin Configurations
SOT-89
Pin Description
PIN VOUT GND VIN SOT-89 1 2 3 Output voltage of the LDO Ground: TAB is connected to ground Input Voltage of the LDO DESCRIPTION
DS7910A Ver1.0
May 2008
2
EUP7910A
Ordering Information
Order Number Package Type Marking Operating Temperature Range
EUP7910A-33CIR1
SOT-89
xxxxx 7910A1H
-40 C to 85C
EUP7910A-1/4
1/4
1/4
1/4
1/4
1/4
Lead Free Code 1: Lead Free 0: Lead Packing R: Tape & Reel Operating temperature range I: Industry Standard Package Type: C: SOT89 Output Voltage
DS7910A Ver1.0
May 2008
3
EUP7910A
Absolute Maximum Ratings
Supply Voltage VIN ---------------------------------------------------------------------6.5V Package Thermal Resistance SOT-89, JA -------------------------------------------------------------------------175C /W Power Dissipation, PD@TA=25C SOT-89 ------------------------------------------------------------------------------ 0.55W Junction Temperature ------------------------------------------------------------------- 150C Storage Temperature ------------------------------------------------------ -65C to +150C Reflow Temperature (soldering, 10sec) ------------------------------------------------ 260C ESD Rating Human Body Model ---------------------------------------------------------------------- 2kV
Operating Ratings
Supply Voltage VIN ------------------------------------------------------------------ 3.6 to 6V Junction Temperature ------------------------------------------------------ -40C to +85C
Electrical Characteristics
Conditions: VIN =5V, CIN = COUT= 4.7uF (Ceramic),TA=25ae ,Unless otherwise specified. IL=10mA, COUT= 4.7F.
Symbol
VOUT VLINE VLOAD IQ PSRR VDROP ILIMIT ISC TSD TSD
Parameter
Output Voltage Accuracy Line Regulation Load Regulation Quiescent Current Power Supply Ripple Rejection Dropout Voltage Current Limit Short Circuit Current Thermal Shutdown Temperature Thermal Shutdown Hysteresis
Conditions
10mA IOUT 300mA IOUT=10mA, TA=-40C to 85C VIN=4V to 6V, IOUT=10mA 10mA IOUT 600mA IOUT= 10mA IOUT= 600mA f=120Hz, IOUT=10mA IOUT=600mA
Min
3.234 3.201
EUP7910A Typ Max.
3.3 4 4 170 420 60 300 1 1.2 160 20 450 3.366 3.399 10 15 250 550
Unit
V V mV mV uA uA dB mV A A C C
DS7910A Ver1.0
May 2008
4
EUP7910A
Typical Operating Characteristics Line Transient Response
CIN=1uF, COUT=10uF, IL=100mA
Load Transient Response
CIN=1uF, COUT=10uF CH4:VOUT
CH4:VOUT (offset= 3.3V)
CH3:VIN (offset= 5V)
CH1:IL(100mA/div)
Figure 2.
Figure 3.
Short Circuit Current
CIN=1uF, COUT=10uF, VIN=6V, VOUT=GND Output Current
Power Start-up
CH2:VOUT
CH4:VOUT CH1:IL(100mA/div)
Figure 4.
Figure 5.
Figure 6.
Figure 7.
DS7910A Ver1.0
May 2008
5
EUP7910A
Typical Operating Characteristics (continued)
Figure 8.
Figure 9.
Figure 10.
Figure 11.
VIN=5V CIN=2.2uF COUT=2.2uF IL=10mA
Figure 12.
DS7910A Ver1.0 May 2008
Figure 13.
6
EUP7910A
Application Note
External Capacitors Like any low-dropout regulator, the EUP7910A requires external capacitors for regulator stability. These capacitors must be correctly selected for good performance. Input Capacitor An input capacitance of 1F is required between the EUP7910A input pin and ground (the amount of the capacitance may be increased without limit). This capacitor must be located a distance of not more than 1cm from the input pin and returned to a clean analog ground. Any good quality ceramic, tantalum, or film capacitor may be used at the input. If a tantalum capacitor is used at the input, it must be guaranteed by the manufacturer to have a surge current rating sufficient for the application. There are no requirements for the ESR on the input capacitor, but tolerance and temperature coefficient must be considered when selecting the capacitor to ensure the capacitance will be 1F over the entire operating temperature range. Output Capacitor The EUP7910A is designed specifically to work with very small ceramic output capacitors. A ceramic capacitor (temperature characteristics X7R, X5R, Z5U, or Y5V) in 2.2 to 10F range with 5m to 200m ESR range is suitable in the EUP7910A application circuit. The output capacitor must meet the requirement for minimum amount of capacitance and also have an ESR (Equivalent Series Resistance) value which is within a stable range (5m to 200m) No-Load Stability The EUP7910A will remain stable and in regulation with no external load. This is specially important in CMOS RAM keep-alive applications.
DS7910A Ver1.0
May 2008
7
EUP7910A
Packaging Information
SOT-89
SYMBOLS A L B1 B C D D1 H E e
MILLIMETERS MIN. 1.40 0.89 0.36 0.44 0.35 4.40 1.35 3.94 2.29 1.50 MAX. 1.60 1.20 0.48 0.56 0.44 4.60 1.83 4.25 2.60
INCHES MIN. 0.055 0.035 0.014 0.017 0.014 0.173 0.053 0.155 0.090 0.059 MAX. 0.063 0.047 0.019 0.022 0.017 0.181 0.072 0.167 0.102
DS7910A Ver1.0
May 2008
8

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