EUTECH EUP7914

EUP7914
150mA Low-Noise LDO in SC-82
Without A Bypass Capacitor
DESCRIPTION
FEATURES
The EUP7914 is an efficient CMOS low dropout (LDO)
voltage regulator optimized for ultra-low-noise
applications. It offers high output accuracy, extremely
low dropout voltage, low ground current and fast
start-up time. The EUP7914 provides a very low noise
output without a bypass capacitor, ideal for RF
applications where a clean supply voltage source is
required. Specifically designed for handheld and
battery-powered devices, the EUP7914 provides a
TTL-logic-compatible enable pin. When the EUP7914
is disabled, power consumption drops nearly to zero.
Key features include current limit, thermal shutdown
and faster transient response.
The EUP7914 works with low-ESR ceramic capacitors.
Available in the SC-82 space saving package which
reduces the amount of board space for power
applications. The EUP7914 offers wide fixed output
voltage versions.
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2.5V to 5.5V Input Voltage Range
30µV(rms) Output Noise
90mV Dropout @ 150mA
70dB PSRR at 1kHz No Bypass Capacitor
Low 30µA Ground Current
Guaranteed 150mA Output Current
Stable with a 1µF Ceramic Output Capacitor when
VOUT ≥ 1.5V, or 2.2µF when VOUT<1.5V
Excellent Load/Line Transient
Thermal Shutdown and Current Limit
Protection
Available 1.2V to 3.6V Fixed Output Voltages
(50mV increments)
Space-Saving 4-pin SC-82 Package
RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
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Block Diagram
Figure 1.
DS7914
Ver1.0
Nov. 2008
1
Cellular Phones
Camera Modules
PDA and Palmtop Computers
Consumer/Personal Electronics
EUP7914
Typical Application Circuit
Figure 2. Fixed-Voltage LDO Regulator
Pin Configurations
Package Type
Pin
Configurations
(Top View)
SC-82
Pin Description
NAME
PIN
EN
1
GND
2
The device enable input. Set logic high to enable the device, and connect logic low to
disable the device.
Ground pin
OUT
3
Output voltage of the LDO
IN
4
Input voltage of the LDO
DS7914
Ver1.0
Nov. 2008
DESCRIPTION
2
EUP7914
Ordering Information
Order Number
Package Type
Marking
Operating Temperature Range
EUP7914-12NIR1
SC-82
ET xx
-40 °C to +85°C
EUP7914-15NIR1
SC-82
EC xx
-40 °C to +85°C
EUP7914-18NIR1
SC-82
ED xx
-40 °C to +85°C
EUP7914-25NIR1
SC-82
EB xx
-40 °C to +85°C
EUP7914-28NIR1
SC-82
EE xx
-40 °C to +85°C
EUP7914-285NIR1
SC-82
EF xx
-40 °C to +85°C
EUP7914-30NIR1
SC-82
EG xx
-40 °C to +85°C
EUP7914-33NIR1
SC-82
EH xx
-40 °C to +85°C
EUP7914- □□□ □ □ □ □
Lead Free Code
1: Lead Free 0: Lead
Packing
R: Tape & Reel
Operating temperature range
I: Industry Standard
Package Type
N: SC-82
Output Voltage
12: 1.2V
15: 1.5V
18: 1.8V
25: 2.5V
28: 2.8V
285: 2.85V
30: 3.0V
33: 3.3V
DS7914
Ver1.0
Nov. 2008
3
EUP7914
Absolute Maximum Ratings (1)
„
„
„
„
„
„
„
IN,OUT and EN to GND-----------------------------------------------------------0.3V to 6V
Junction Temperature ---------------------------------------------------------------------- 150°C
Storage Temperature Range ---------------------------------------------------- -65°C to +150°C
Lead Temperature -------------------------------------------------------------------------- 260°C
Maximum Power Dissipation SC-82 ---------------------------------------------------0.3W
Thermal Resistance θJA(SC-82) --------------------------------------------------------- 320°C/W
ESD Rating
Human Body Model --------------------------------------------------------------------- ±2kV
Recommend Operating Conditions (2)
„
„
„
VIN ------------------------------------------------------------------------------------- 2.5V to 5.5V
VEN ------------------------------------------------------------------------------------ 0V to 5.5V
Operating Temperature Range ------------------------------------------------ -40°C to +85°C
Note (1): Stress beyond those listed under “Absolute Maximum Ratings” may damage the device.
Note (2): The device is not guaranteed to function outside the recommended operating conditions.
Electrical Characteristics
Conditions: VIN=VOUT+0.5V or 2.5V whichever is greater, VEN=VIN,CIN=COUT=1uF,TA= -40°C to +85℃
,unless otherwise specified.
Symbol
Parameter
Conditions
Input Voltage
∆VOUT
Output Voltage Accuracy
IOUT=1mA to 30mA,TA=+25℃,
IOUT=1mA to 30mA,
TA=-40℃ to +85℃
IOUTMAX Maximum Output Current
ILIMIT Current Limit
VOUT=VOUT(nom) × 90%
VOUT ≥ 3V, IOUT=150mA
VDROP Dropout Voltage (3)
2.4 ≤ VOUT ≤ 3V, IOUT=150mA
IQ
Quiescent Current
No Load
VLNR
Line Regulation
VIN=(VOUT+0.5V) to 5.5V, IOUT=10mA
VLDR
Load Regulation
1mA ≤ IOUT ≤ 150mA
ISHDN Shutdown Supply Current VEN=0,TA=+25℃
VIN=(VOUT+1V) f=1kHz, ILOAD=10mA
Power Supply Ripple
VIN=(VOUT+1V) f=10kHz, ILOAD=10mA
PSRR
Rejection
VIN=(VOUT+1V) f=100kHz,
ILOAD=10mA
Output Noise Voltage
f=10Hz~100kHz, VOUT=1.5V,
No Load
(RMS)
Turn-on Time (4)
RLOAD=50Ω,TA=+25℃
VENL
VENL (EN logic low)
VIN=2.5V to 5.5V
VENH VENH (EN logic high)
VIN=2.5V to 5.5V
VEN Input Bias Current
VIN=5.5V, VEN=0 or 5.5V
RDIS Output Discharge Switch VEN=0,VIN=3.6V
Thermal Shutdown
TSD
Temperature
Thermal Shutdown
∆TSD
Hysteresis
EUP7914
Min
Typ
Max.
2.5
-2
5.5
2
V
%
-3
3
%
150
160
300
90
100
30
0.02
7
0.3
70
55
mA
mA
135
150
50
0.15
15
1.5
Ver1.0
Nov. 2008
4
mV
µA
%/V
mV
µA
dB
45
30
µV
100
500
µs
V
V
µA
Ω
155
℃
15
℃
0.4
1.5
-1
1
Note (3): Dropout is defined as VIN-VOUT when VOUT is 100mV below the value of VOUT for VIN=VOUT+0.5V
Note (4): Time needed for VOUT to reach 90% of final value.
DS7914
Unit
EUP7914
Typical Characteristics (CIN=COUT=1µF)
DS7914
Ver1.0
Nov. 2008
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EUP7914
Typical Characteristics (continued)
DS7914
Ver1.0
Nov. 2008
6
EUP7914
Typical Characteristics (continued)
DS7914
Ver1.0
Nov. 2008
7
EUP7914
Application Note
Input Capacitor
An input capacitance of 1µF or higher is required between the EUP7914 input pin IN 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 1µF over the entire operating temperature range.
Output Capacitor
The EUP7914 is designed specifically to work with very small ceramic output capacitors. A ceramic capacitor
(temperature characteristics X7R or X5R) in 1µF to 10µF range with 5mΩ to 500mΩ ESR range is suitable in the
EUP7914 application circuit. The output capacitor must meet the requirement for minimum amount of
capacitance to maintain good loop stability and phase margin. See the table below.
Output Voltage
Output Capacitor Minimum Value
1.2~1.45
2.2uF
1.5~3.6
1uF
No-Load Stability
The EUP7914 is stable without any external load. This is specially important for CMOS RAM keep-alive
applications.
On/Off Input Operation
The EUP7914 is turned off by pulling the EN pin low, and turned on by pulling it high. If this pin is floating, the
regulator will always be on .To assure proper operation, the signal source used to drive the VEN input must be able
to swing above and below the specified turn-on/off voltage thresholds listed in the Electrical Characteristics.
When EN is logic low, output is internally discharged to GND through a 500 resistor.
DS7914
Ver1.0
Nov. 2008
8
EUP7914
Packaging Information
SC-82
SYMBOLS
A
A1
b
b1
D
E
E1
e
L
DS7914
Ver1.0
Nov. 2008
MILLIMETERS
MIN.
MAX.
0.80
1.10
0.00
0.10
0.25
0.40
0.35
0.50
2.00
1.80
2.40
1.25
1.30
0.21
0.46
9
INCHES
MIN.
0.031
0.000
0.010
0.014
MAX.
0.044
0.004
0.016
0.020
0.079
0.071
0.094
0.049
0.051
0.008
0.018