EUP7915
150mA Low-Noise LDO in SOT23-5
DESCRIPTION
The EUP7915 is an efficient, CMOS 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 EUP7915 provides a very low noise output, ideal
for RF applications where a clean voltage source is
required. A noise bypass pin is also available for
further reduction of output noise.
Designed specifically for handheld and battery-
powered devices, the EUP7915 provides a
TTL-logic-compatible enable pin. When disabled,
power consumption drops nearly to zero.
The EUP7915 also works with low-ESR ceramic
capacitors, reducing the amount of board space
necessary for power applications, critical in handheld
wireless devices.
Available in the SOT23-5 package, the EUP7915
offers a wide range of output voltages. Key features
include current limit, thermal shutdown and faster
transient response.
FEATURES
5-pin SOT23-5 Package
2.5V to 5.5V Input Voltage Range
50µV(rms) Output Noise
140mV Dropout @ 150mA
75dB PSRR at 1kHz
Low 70µA Ground Current
150mA Output Current
Stability with 1µF Ceramic Output Capacitors
Excellent Load/Line Transient
Thermal Shutdown and Current Limit
Protection
Available in 1.2V,1.5V,1.8V,2.5V,2.8V,2.85V,
2.9V,3.0V,3.3V,4.8V and Adjustable Voltages
RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
Cellular Phones
Bluetooth Portable Radios and Accessories
PDA and Palmtop Computers
Consumer/Personal Electronics
Block Diagram
Figure 1. Fixed-Voltage
DS7915
Ver1.4
Apr. 2008
1
EUP7915
Block Diagram (Continued)
Figure 2. Adjustable Voltage
Typical Application Circuit
Figure 3. Fixed Output Voltage Regulator
Figure 4. Adjustable Voltage Regulator
DS7915
Ver1.4
Apr. 2008
2
EUP7915
Pin Configurations
Package Type
Pin
Configurations
SOT23-5
Fixed-Voltage
Adjustable Voltage
Pin Description
PIN
V
IN
GND
V
EN
BYPASS
ADJ
V
OUT
PIN
1
2
3
4
5
Input voltage of the LDO
Common ground
Enable input logic, enable high
Optional bypass capacitor for noise reduction
Adjustable regulator feedback input. Connect to resistor divider.
Output voltage of the LDO
DESCRIPTION
DS7915
Ver1.4
Apr. 2008
3
EUP7915
Ordering Information
Order Number
Package Type
Marking
Operating Temperature Range
EUP7915-12VIR1
EUP7915-15VIR1
EUP7915-18VIR1
EUP7915-25VIR1
EUP7915-28VIR1
EUP7915-285VIR1
EUP7915-29VIR1
EUP7915-30VIR1
EUP7915-33VIR1
EUP7915-48VIR1
EUP7915VIR1
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
ZT
□ □ □ □
ZC
□ □ □ □
ZD
□ □ □ □
ZB
□ □ □ □
ZE
□ □ □ □
ZF
□ □ □ □
ZW
□ □ □ □
ZG
□ □ □ □
ZH
□ □ □ □
ZK
□ □ □ □
ZA
□ □ □ □
Lead Free Code
1: Lead Free 0: Lead
Packing
R: Tape & Reel
Operating temperature range
I: Industry Standard
Package Type
V: SOT-23
Output Voltage
12: 1.2V 15: 1.5V
18: 1.8V 25: 2.5V
28: 2.8V 285: 2.85V
29: 2.9V 30: 3.0V
33: 3.3V 48: 4.8V
Blank: Adjustable
-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
EUP7915-
□□□ □ □ □ □
Absolute Maximum Ratings
V
IN
,V
EN
------------------------------------------------------------------------------- -0.3 to 6V
V
OUT
----------------------------------------------------------------- -0.3 to (V
IN
+0.3)
≤
6V
Junction Temperature ------------------------------------------------------------------- 150°C
Storage Temperature Range ------------------------------------------------- -65°C to +150°C
Lead Temperature ----------------------------------------------------------------------- 260°C
Maximum Power Dissipation ---------------------------------------------------------
0.3W
Thermal Resistance
θ
JA
-------------------------------------------------------------- 320°C/W
ESD Rating
Human Body Model ------------------------------------------------------------------- 2kV
Operating Ratings
V
IN
---------------------------------------------------------------------------------- 2.5 to 5.5V
V
EN
-------------------------------------------------------------------- 0 to (V
IN
+0.3)
≤
5.5V
Operating Temperature Range -------------------------------------------- -40°C to +125°C
DS7915
Ver1.4
Apr. 2008
4
EUP7915
Electrical Characteristics
Conditions: V
IN
=V
OUT
+0.2V if V
OUT
≧2.5V,
V
IN
=2.5V
if V
OUT
<2.5V
,V
EN
=V
IN
, C
IN
=1uF, C
OUT
=1uF,T
A
= -40~ 85℃
Unless otherwise specified. Typical values are at 25℃.
Symbol
Parameter
Input Voltage
Conditions
I
OUT
=1mA,T
A
=25℃
I
OUT
=1mA,T
A
=-40℃ to 85℃
T
A
>0, V
IN
=V
OUT
+ 0.2V for
V
OUT
> 3.3V or V
IN
=V
OUT
+0.5V
V
OUT
=V
OUT
(nom)
×
90%, T
A
>0℃
I
OUT
=150mA, V
OUT
<3.3V
I
OUT
=100mA, V
OUT
>3.3V
I
OUT
=1mA
V
IN
=(V
OUT
+0.2V) to 5.5V,
I
OUT
=1mA
1mA
≤
I
OUT
≤
100mA
(V
IN
=V
OUT
+ 0.2V)
1mA
≤
I
OUT
≤
150mA
(V
IN
=V
OUT
+ 0.5V)
V
EN
=0,T
A
=25℃
V
IN
=(V
OUT
+1V)DC+0.5V
P-P
f=1kHz,
I
LOAD
=10mA
EUP7915
Min
Typ
Max.
2.5
-2
-3
150
160
220
140
60
70
0.02
0.002
400
240
100
160
0.25
0.013
1
75
50
239
200
0.4
1.5
1
1
1.176
1.2
155
15
1.224
5.5
2
3
Unit
V
%
%
mA
mA
mV
µA
%/V
%/mA
µA
dB
µV
µV
µs
V
V
nA
nA
V
℃
℃
∆V
OUT
Output Voltage Accuracy
I
OUTMAX
Maximum Output Current
I
LIMIT
V
DROP
I
Q
V
LNR
V
LDR
I
SHDN
PSRR
Current Limit
Dropout Voltage (Note1)
Quiescent Current
Line Regulation
Load Regulation
Shutdown Supply Current
Power Supply Ripple
Rejection
Output Noise Voltage
f=10Hz~100kHz, I
LOAD
=10mA
(Bypass)
Output Noise Voltage (ADJ) f=10Hz~100kHz, I
LOAD
=10mA
Turn-on Time (Note2)
R
LOAD
=50Ω,T
A
=25℃
VENL (Maximum Low Level
V
IN
=2.5V to 5.5V
Input Voltage at EN)
VENH (Minimum high Level
V
IN
=2.5V to 5.5V
Input Voltage at EN)
VEN Input Bias Current
V
IN
=5.5V, V
EN
=0 or 5.5V
FB Input Bias Current (ADJ
V
IN
=5.5V, V
FB
=1.3V
Version)
FB Pin Voltage (ADJ
T
A
=25℃
Version)
Thermal Shutdown
Temperature
Thermal Shutdown
Hysteresis
V
ENL
V
ENH
V
FB
T
SD
∆T
SD
Note 1: The dropout voltage is defined as V
IN
-V
OUT
when V
OUT
is 100mV below the nominal value of V
OUT.
Note 2: Test time needed for V
OUT
to reach 90% of final value.
DS7915
Ver1.4
Apr. 2008
5
