December 2011 Doc ID 15527 Rev 5 1/23
23
LD39115Jxx
150 mA low quiescent current
low noise voltage regulator
Features
■Input voltage from 1.5 to 5.5 V
■Ultra low dropout voltage (80 mV typ. at 100
mA load)
■Very low quiescent current (20 µA typ. at no
load, 35 µA typ. at 150 mA load, 1 µA max in off
mode)
■Very low noise (33 µVRMS from 1 kHz to 100
kHz at VOUT = 1.8 V)
■Output voltage tolerance: ± 2.0 % @ 25 °C
■150 mA guaranteed output current
■Wide range of output voltages available on
request: 0.8 V to 4.5 V with 100 mV step
■Logic-controlled electronic shutdown
■Compatible with ceramic capacitor COUT = 1 µF
■Internal current and thermal limit
■Flip-chip 4 bumps 0.8 x 0.8 mm. pitch
■Temperature range: -40 °C to 125 °C
Applications
■Mobile phones
■Personal digital assistants (PDAs)
■Cordless phones and similar battery-powered
systems
Description
The LD39115Jxx provides 150 mA maximum
current from an input voltage ranging from 1.5 V
to 5.5 V with a typical dropout voltage of 80 mV. It
is stabilized with a ceramic capacitor. The ultra
low drop voltage, low quiescent current and low
noise features make it suitable for low power
battery-powered applications. Power supply
rejection is 65 dB at low frequencies and starts to
roll off at 10 kHz. An enable logic control function
puts the LD39115Jxx in shutdown mode allowing
a total current consumption lower than 1 µA. The
device also includes a short-circuit constant
current limiting and thermal protection.
Flip-chip 4
Table 1. Device summary
Part numbers Order codes Output voltages
LD39115JXX12 LD39115J12R 1.2 V
LD39115JXX15 LD39115J15R 1.5 V
LD39115JXX18 LD39115J18R 1.8 V
LD39115JXX25 LD39115J25R 2.5 V
LD39115JXX28 LD39115J28R 2.8 V
LD39115JXX30 LD39115J30R 3.0 V
LD39115JXX33 LD39115J33R 3.3 V
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Contents LD39115Jxx
2/23 Doc ID 15527 Rev 5
Contents
1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8 Different output voltage versions of the LD39115Jxx
available on request . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
LD39115Jxx Diagram
1 Diagram
Figure 1. Block diagram
Trimming
1.22 V
BandGap
Enable
EN
GND
OUT
IN
Protection
Thermal R2
R1
Trimming
1.22 V
BandGap
Enable
EN
GND
OUT
IN
Protection
Thermal R2
R1
Pin configuration LD39115Jxx
4/23 Doc ID 15527 Rev 5
2 Pin configuration
Figure 2. Pin connection (top view)
Table 2. Pin description
Pin n° Symbol Function
A2 EN Enable pin logic input: Low = shutdown, High = active
A1 GND Common ground
B2 IN Input voltage of the LDO
B1 OUT Output voltage
LD39115Jxx Typical application
Doc ID 15527 Rev 5 5/23
3 Typical application
Figure 3. Typical application circuit
1 µF
IN
EN
VEN
VIN OUT
Load
GND
1 µF
VOUT
1 µF
IN
EN
VEN
VIN OUT
Load
GND
1 µF
VOUT
Maximum ratings LD39115Jxx
6/23 Doc ID 15527 Rev 5
4 Maximum ratings
Note: Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these conditions is not implied. All values are referred to GND.
Table 3. Absolute maximum ratings
Symbol Parameter Value Unit
VIN DC input voltage - 0.3 to 6 V
VOUT DC output voltage - 0.3 to VI + 0.3 V
VEN Enable input voltage - 0.3 to VI + 0.3 V
IOUT Output current Internally limited mA
PDPower dissipation Internally limited mW
TSTG Storage temperature range - 65 to 150 °C
TOP Operating junction temperature range - 40 to 125 °C
Table 4. Thermal data
Symbol Parameter Value Unit
RthJA Thermal resistance junction-ambient 180 °C/W
LD39115Jxx Electrical characteristics
Doc ID 15527 Rev 5 7/23
5 Electrical characteristics
TJ = 25 °C, VIN = VOUT(NOM) + 1 V, CIN = COUT = 1 µF, IOUT = 1 mA, VEN = VIN, unless
otherwise specified.
Table 5. Electrical characteristics for LD39115Jxx (1)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VIN Operating input voltage 1.5 5.5 V
VUVLO
Turn-on threshold 1.45 1.48 V
Turn-off threshold 1.30 1.35 mV
VOUT VOUT accuracy
VOUT>1.5V, IOUT=1mA, TJ=25°C -2.0 2.0 %
VOUT>1.5V, IOUT=1mA,
-40°C<TJ<125°C -3.0 3.0 %
VOUT ≤ 1.5V, IOUT=1mA ±10 mV
VOUT ≤ 1.5V, IOUT=1mA,
-40°C<TJ<125°C ±30 mV
ΔVOUT Static line regulation VOUT +1V ≤ VIN ≤ 5.5V, IOUT=1mA 0.01 %/V
ΔVOUT
Transient line regulation
(2)
ΔVIN=+500mV, IOUT=1mA,
TR=TF=5µs 10 mVpp
ΔVOUT Static load regulation IOUT=1mA to 150mA 0.002 %/mA
ΔVOUT
Transient load
regulation (2) IOUT=1mA to 150mA, tR=tF=5µs 40 mVpp
VDROP Dropout voltage (3) IOUT=100mA, VOUT>1.5V
-40°C<TJ<125°C 80 110 mV
eNOutput noise voltage 10Hz to 100kHz, IOUT=10mA 30 µVRMS/V
SVR Supply voltage rejection
VOUT = 1.5V
VIN=VOUTNOM+1V+/-VRIPPLE
VRIPPLE=0.1V Freq.=1kHz
IOUT = 10mA
74
dB
VIN=VOUTNOM+0.5V+/-VRIPPLE
VRIPPLE=0.1V Freq.=10kHz
IOUT=10mA
67
IQQuiescent current
IOUT=0mA 20
µA
IOUT=0mA, -40°C<TJ<125°C 50
IOUT=0 to 150mA 35
IOUT=0 to 150mA, -40°C<TJ<125°C 70
VIN input current in OFF MODE:
VEN=GND 0.001 1
ISC Short circuit current RL=0 200 mA
VEN
Enable input logic low VIN=1.5V to5.5V, -40°C<TJ<125°C 0.4 V
Enable input logic high VIN=1.5V to 5.5V, -40°C<TJ<125°C 0.9
IEN Enable pin input current VSHDN=VIN 0.1 100 nA
TON Turn on time (4) 30 µs
Electrical characteristics LD39115Jxx
8/23 Doc ID 15527 Rev 5
Symbol Parameter Test conditions Min. Typ. Max. Unit
TSHDN
Thermal shutdown 160 °C
Hysteresis 20
COUT Output capacitor Capacitance (see Section 6: Typical
performance characteristics)122µF
1. For VOUT(NOM) < 1.2 V, VIN = 1.5 V.
2. All transient values are guaranteed by design, not production tested.
3. Dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mV below its nominal value. This
specification does not apply for output voltages below 1.5 V.
4. Turn-on time is time measured between the enable input just exceeding VEN high value and the output voltage just
reaching 95 % of its nominal value.
Table 5. Electrical characteristics for LD39115Jxx (continued) (1)
LD39115Jxx Electrical characteristics
Doc ID 15527 Rev 5 9/23
TJ = 25 °C, VIN = VOUT(NOM) + 1 V, CIN = COUT = 1 µF, IOUT = 1 mA, VEN = VIN, unless
otherwise specified.
Table 6. Electrical characteristics for LD39115SJxx (1)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VIN Operating input voltage 1.5 5.5 V
VUVLO
Turn-on threshold 1.45 1.48 V
Turn-off threshold 1.30 1.35 mV
VOUT VOUT accuracy
VOUT >1.5V, IOUT=1mA, TJ=25°C -2.0 2.0 %
VOUT >1.5V, IOUT=1mA,
-40°C<TJ<125°C -3.0 3.0 %
VOUT ≤ 1.5V, IOUT=1mA ±10 mV
VOUT ≤ 1.5V, IOUT=1mA,
-40°C<TJ<125°C ±30 mV
ΔVOUT Static line regulation VOUT +1V ≤ VIN ≤ 5.5V, IOUT=1mA 0.01 %/V
ΔVOUT
Transient line regulation
(2) ΔVIN=+500mV, IOUT=1mA, TR=TF=5µs 10 mVpp
ΔVOUT Static load regulation IOUT = 1mA to 150mA 0.002 %/mA
ΔVOUT
Transient load
regulation (2) IOUT = 1mA to 150mA, TR=TF=5µs 40 mVpp
VDROP Dropout voltage (3) IOUT = 100mA, VOUT>1.5V
-40°C<TJ<125°C 80 110 mV
eNOutput noise voltage 10Hz to 100kHz, IOUT=10mA 30 µVRMS
/V
SVR Supply voltage rejection
VOUT = 1.5V
VIN = VOUTNOM+1V+/-VRIPPLE
VRIPPLE = 0.1V Freq.=1kHz
IOUT=10mA
74
dB
VIN = VOUTNOM+0.5V+/-VRIPPLE
VRIPPLE=0.1V Freq.=10kHz
IOUT=10mA
67
IQQuiescent current
IOUT=0mA 20
µA
IOUT=0mA, -40°C<TJ<125°C 50
IOUT=0 to 150mA 35
IOUT=0 to 150mA, -40°C<TJ<125°C 70
VIN input current in OFF MODE:
VEN=GND 0.001 1
ISC Short circuit current RL=0 200 mA
VEN
Enable input logic low VIN=1.5V to 5.5V, -40°C<TJ<125°C 0.4 V
Enable input logic high VIN = 1.5V to 5.5V, -40°C<TJ<125°C 0.9
IEN Enable pin input current VSHDN=VIN 0.1 100 nA
TON Turn on time (4) 100 µs
Electrical characteristics LD39115Jxx
10/23 Doc ID 15527 Rev 5
Symbol Parameter Test conditions Min. Typ. Max. Unit
TSHDN
Thermal shutdown 160 °C
Hysteresis 20
COUT Output capacitor Capacitance (see Section 6: Typical
performance characteristics)122µF
1. For VOUT(NOM) < 1.2 V, VIN = 1.5 V.
2. All transient values are guaranteed by design, not production tested.
3. Dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mV below its nominal value. This
specification does not apply for output voltages below 1.5 V.
4. Turn-on time is time measured between the enable input just exceeding VEN high value and the output voltage just
reaching 95 % of its nominal value.
Table 6. Electrical characteristics for LD39115SJxx (continued) (1)
LD39115Jxx Typical performance characteristics
Doc ID 15527 Rev 5 11/23
6 Typical performance characteristics
CIN = COUT = 1 µF, VEN to VIN.
Figure 4. Output voltage vs. temperature
(VIN = 2.2 V)
Figure 5. Output voltage vs. temperature
(VIN = 3.8 V)
Figure 6. Line regulation vs. temperature Figure 7. Load regulation vs. temperature
Figure 8. Short-circuit current vs. drop
voltage
Figure 9. Dropout voltage vs. temperature
V
IN
= 2.2 V, I
OUT
= 1 mA
V
OUT
= 1.2 V
1.1
1.12
1.14
1.16
1.18
1.2
1.22
1.24
1.26
1.28
1.3
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
VOUT [V]
V
IN
= 2.2 V, I
OUT
= 1 mA
V
OUT
= 1.2 V
1.1
1.12
1.14
1.16
1.18
1.2
1.22
1.24
1.26
1.28
1.3
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
VOUT [V]
V
IN
= 3.8 V, I
OUT
= 1 mA
V
OUT
= 2.8 V
2.6
2.65
2.7
2.75
2.8
2.85
2.9
2.95
3
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
V
OUT
[V]
V
IN
= 3.8 V, I
OUT
= 1 mA
V
OUT
= 2.8 V
2.6
2.65
2.7
2.75
2.8
2.85
2.9
2.95
3
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
V
OUT
[V]
V
IN
= from 2.2 V to 5.5 V, I
OUT
= 1 mA
V
OUT
=1.2V
0
0.01
0.02
0.03
0.04
0.05
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
Line [%/V]
V
IN
= from 2.2 V to 5.5 V, I
OUT
= 1 mA
V
OUT
=1.2V
0
0.01
0.02
0.03
0.04
0.05
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
Line [%/V]
V
IN
= 2.2 V, I
OUT
= from 1 to 150 mA
V
OUT
=1.2 V
0
0.0005
0.001
0.0015
0.002
0.0025
0.003
0.0035
0.004
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
Load [%/mA]
V
IN
= 2.2 V, I
OUT
= from 1 to 150 mA
V
OUT
=1.2 V
0
0.0005
0.001
0.0015
0.002
0.0025
0.003
0.0035
0.004
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
Load [%/mA]
C
IN
= 1 µF C
OUT
= 1 µF(+ 10 µF electrolitycs)
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0123456
DROP [V]
ISC [A]
125
85
55
25
0
-25
-40
C
IN
= 1 µF C
OUT
= 1 µF(+ 10 µF electrolitycs)
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0123456
DROP [V]
ISC [A]
125
85
55
25
0
-25
-40
V
OUT
= 2.8 V
I
OUT
= 0.1 A
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
-75 -50 -25 0 25 50 75 100 125 150 175
TEMPERATURE [°C]
VDROPOUT [V]
V
OUT
= 2.8 V
I
OUT
= 0.1 A
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
-75 -50 -25 0 25 50 75 100 125 150 175
TEMPERATURE [°C]
VDROPOUT [V]
Typical performance characteristics LD39115Jxx
12/23 Doc ID 15527 Rev 5
Figure 10. Dropout voltage vs. output current Figure 11. Output voltage vs. input voltage
(IOUT = 0.15 A)
Figure 12. Output voltage vs. input voltage
(VOUT = 1.3 V)
Figure 13. Output voltage vs. input voltage
(VOUT = 2.8 V)
Figure 14. Enable threshold vs. temperature Figure 15. Quiescent current vs. temperature
(VOUT = 1.2 V)
VOUT = 2.8 V
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0 0.05 0.1 0.15 0.2 0.25
I
OUT
[A]
VDROPOUT [V]
VOUT = 2.8 V
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0 0.05 0.1 0.15 0.2 0.25
I
OUT
[A]
VDROPOUT [V]
VOUT = 1.3 V
IOUT = 0.15 A
0
0.2
0.4
0.6
0.8
1
1.2
1.4
0123456
VIN [V]
VOUT [V]
125
85
55
25
0
-25
-40
VOUT = 1.3 V
IOUT = 0.15 A
0
0.2
0.4
0.6
0.8
1
1.2
1.4
0123456
VIN [V]
VOUT [V]
125
85
55
25
0
-25
-40
V
OUT
= 1.3 V
I
OUT
= 0.15 A
0
0.2
0.4
0.6
0.8
1
1.2
1.4
0123456
V
IN
[V]
V
OUT
[V]
125
85
55
25
0
-25
-40
V
OUT
= 1.3 V
I
OUT
= 0.15 A
0
0.2
0.4
0.6
0.8
1
1.2
1.4
0123456
V
IN
[V]
V
OUT
[V]
125
85
55
25
0
-25
-40
V
OUT
= 2.8 V
I
OUT
= 0.15 A
0
0.5
1
1.5
2
2.5
3
0123456
V
IN
[V]
V
OUT
[V]
125
85
55
25
0
-25
-40
V
OUT
= 2.8 V
I
OUT
= 0.15 A
0
0.5
1
1.5
2
2.5
3
0123456
V
IN
[V]
V
OUT
[V]
125
85
55
25
0
-25
-40
V
IN
= 2.2 V, I
OUT
= 1 mA
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
-75 -50 -25 0 25 50 75 100 125 150 175
TEMPERATURE [°C]
V
EN
[V]
V
IN
= 2.2 V, I
OUT
= 1 mA
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
-75 -50 -25 0 25 50 75 100 125 150 175
TEMPERATURE [°C]
V
EN
[V]
V
OUT
= 1.2 V
V
IN
= 2.2 V, No Load
0
5
10
15
20
25
30
35
40
45
-75 -50 -25 0 25 50 75 100 125 150 175
TEMPERATURE [°C]
I
Q
[µA]
V
OUT
= 1.2 V
V
IN
= 2.2 V, No Load
0
5
10
15
20
25
30
35
40
45
-75 -50 -25 0 25 50 75 100 125 150 175
TEMPERATURE [°C]
I
Q
[µA]
LD39115Jxx Typical performance characteristics
Doc ID 15527 Rev 5 13/23
Figure 16. Quiescent current vs. temperature
(VIN = 2.2 V)
Figure 17. Quiescent current vs. temperature
(VIN = 3.8 V)
Figure 18. Quiescent current vs. input voltage Figure 19. Quiescent current vs. output
current
Figure 20. Supply voltage rejection vs.
temperature (VOUT = 1.2 V)
Figure 21. Supply voltage rejection vs.
temperature (VOUT = 1.3 V)
V
OUT
= 1.2 V
V
IN
= 2.2 V, I
OUT
= 0.15 A
0
10
20
30
40
50
60
70
-75 -50 -25 0 25 50 75 100 125 150 175
TEMPERATURE [°C]
I
Q
[µA]
V
OUT
= 1.2 V
V
IN
= 2.2 V, I
OUT
= 0.15 A
0
10
20
30
40
50
60
70
-75 -50 -25 0 25 50 75 100 125 150 175
TEMPERATURE [°C]
I
Q
[µA]
V
OUT
= 2.8 V
V
IN
= 3.8 V, I
OUT
= 0.15 A
0
10
20
30
40
50
60
70
-75 -50 -25 0 25 50 75 100 125 150 175
TEMPERATURE [°C]
IQ[µA]
V
OUT
= 2.8 V
V
IN
= 3.8 V, I
OUT
= 0.15 A
0
10
20
30
40
50
60
70
-75 -50 -25 0 25 50 75 100 125 150 175
TEMPERATURE [°C]
IQ[µA]
V
OUT
= 1.3 V
I
OUT
= 1 mA
0
2.5
5
7.5
10
12.5
15
17.5
20
22.5
25
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
V
IN
[V]
I
Q
[µA]
V
OUT
= 1.3 V
I
OUT
= 1 mA
0
2.5
5
7.5
10
12.5
15
17.5
20
22.5
25
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
V
IN
[V]
I
Q
[µA]
V
OUT
= 2.8 V
V
IN
= 2.3 V
0
5
10
15
20
25
30
35
40
45
50
0 0.025 0.05 0.075 0.1 0.125 0.15 0.175 0.2 0.225
IOUT [A]
IQ[µA]
V
OUT
= 2.8 V
V
IN
= 2.3 V
0
5
10
15
20
25
30
35
40
45
50
0 0.025 0.05 0.075 0.1 0.125 0.15 0.175 0.2 0.225
IOUT [A]
IQ[µA]
V
IN
from 2.1 V to 2.3 V I
OUT
= 10 mA, Freq. = 1 kHz
V
OUT
= 1.2 V
40
50
60
70
80
90
100
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
SVR [dB]
V
IN
from 2.1 V to 2.3 V I
OUT
= 10 mA, Freq. = 1 kHz
V
OUT
= 1.2 V
40
50
60
70
80
90
100
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
SVR [dB]
V
IN
from 2.2 V to 2.4 V, I
OUT
= 10 mA, Freq. = 1 kHz
V
OUT
= 1.3 V
40
50
60
70
80
90
100
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
SVR [dB]
V
IN
from 2.2 V to 2.4 V, I
OUT
= 10 mA, Freq. = 1 kHz
V
OUT
= 1.3 V
40
50
60
70
80
90
100
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
SVR [dB]
Typical performance characteristics LD39115Jxx
14/23 Doc ID 15527 Rev 5
Figure 22. Supply voltage rejection vs.
temperature (Freq. = 1 kHz)
Figure 23. Supply voltage rejection vs.
temperature (Freq. = 10 kHz)
Figure 24. Supply voltage rejection vs.
temperature (VOUT = 2.8 V)
Figure 25. Supply voltage rejection vs.
frequency (VOUT = 1.2 V)
Figure 26. Supply voltage rejection vs.
frequency (VOUT = 1.3 V)
Figure 27. Supply voltage rejection vs.
frequency (VOUT = 2.8 V)
V
IN
from 3.7 V to 3.9 V, I
OUT
= 10 mA, Freq. = 1 kHz
V
OUT
= 2.8 V
40
50
60
70
80
90
100
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
SVR [dB]
V
IN
from 3.7 V to 3.9 V, I
OUT
= 10 mA, Freq. = 1 kHz
V
OUT
= 2.8 V
40
50
60
70
80
90
100
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
SVR [dB]
V
IN
from 1.7 V to 1.9 V, I
OUT
= 10 mA, Freq. = 10 kHz
V
OUT
= 1.3 V
40
50
60
70
80
90
100
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
SVR [dB]
V
IN
from 1.7 V to 1.9 V, I
OUT
= 10 mA, Freq. = 10 kHz
V
OUT
= 1.3 V
40
50
60
70
80
90
100
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
SVR [dB]
V
IN
from 3.2 V to 3.4 V, I
OUT
= 10 mA, Freq. = 10 kHz
V
OUT
= 2.8 V
40
50
60
70
80
90
100
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
SVR [dB]
V
IN
from 3.2 V to 3.4 V, I
OUT
= 10 mA, Freq. = 10 kHz
V
OUT
= 2.8 V
40
50
60
70
80
90
100
-75 -50 -25 0 25 50 75 100 125 150 175
T [°C]
SVR [dB]
V
IN
from 2.1 V to 2.3 V, I
OUT
= 10 mA
V
OUT
= 1.2 V
0
10
20
30
40
50
60
70
80
90
100
0 102030405060708090100110
Frequency [kHz]
SVR [dB]
V
IN
from 2.1 V to 2.3 V, I
OUT
= 10 mA
V
OUT
= 1.2 V
0
10
20
30
40
50
60
70
80
90
100
0 102030405060708090100110
Frequency [kHz]
SVR [dB]
V
IN
from 1.7 V to 1.9 V, I
OUT
= 10 mA
V
OUT
= 1.3 V
0
10
20
30
40
50
60
70
80
90
100
0 102030405060708090100110
Frequency [KHz]
SVR [dB]
V
IN
from 1.7 V to 1.9 V, I
OUT
= 10 mA
V
OUT
= 1.3 V
0
10
20
30
40
50
60
70
80
90
100
0 102030405060708090100110
Frequency [KHz]
SVR [dB]
V
IN
from 3.2 V to 3.4 V, I
OUT
= 10 mA
V
OUT
= 2.8 V
0
10
20
30
40
50
60
70
80
90
100
0 10 20 30 40 50 60 70 80 90 100 110 120
Frequency [kHz]
SVR [dB]
V
IN
from 3.2 V to 3.4 V, I
OUT
= 10 mA
V
OUT
= 2.8 V
0
10
20
30
40
50
60
70
80
90
100
0 10 20 30 40 50 60 70 80 90 100 110 120
Frequency [kHz]
SVR [dB]
LD39115Jxx Typical performance characteristics
Doc ID 15527 Rev 5 15/23
Figure 28. Supply voltage rejection vs. output
current
Figure 29. LD39115J noise
Figure 30. Line regulation transient Figure 31. Start up transient
VIN from 2.2 V to 2.7 V, IOUT = 1 mA, COUT = 1 µF, No CIN
tRISE/FALL = 5 µs
VIN from 0 to 2.3 V, IOUT = 1 mA COUT = 1 µF No CIN,
tRISE = 60 µs
Figure 32. Enable transient (VOUT = 1.2 V) Figure 33. Enable transient (VOUT = 2.8 V)
VIN = 2.3 V, VEN from 0 to 2 V, IOUT = 1 mA
VIN = 2.3 V, VEN from 0 to 2 V, IOUT = 1 mA, tRISE = 6 µs
V
IN
from 1.7 V to 1.9 V, F = 10 kHz
V
OUT
= 1.3 V
0
10
20
30
40
50
60
70
80
90
100
0 0.025 0.05 0.075 0.1 0.125 0.15 0.175 0.2 0.225 0.25
I
OUT
[A]
SVR [dB]
V
IN
from 1.7 V to 1.9 V, F = 10 kHz
V
OUT
= 1.3 V
0
10
20
30
40
50
60
70
80
90
100
0 0.025 0.05 0.075 0.1 0.125 0.15 0.175 0.2 0.225 0.25
I
OUT
[A]
SVR [dB]
0
0.2
0.4
0.6
0.8
1
0 20000 40000 60000 80000 100000
Freq [Hz]
Noise [µV/SQRT(Hz)]
V
OUT
= 1.3 V, V
IN
= 2.3 V, T
A
= 25 °C
0
0.2
0.4
0.6
0.8
1
0 20000 40000 60000 80000 100000
Freq [Hz]
Noise [µV/SQRT(Hz)]
V
OUT
= 1.3 V, V
IN
= 2.3 V, T
A
= 25 °C
VIN
VOUT
VIN
VOUT
VIN
VOUT
VIN
VOUT
VEN
VOUT
VOUT = 1.2 V
VEN
VOUT
VOUT = 1.2 V
VEN
VOUT VOUT = 2.8 V
VEN
VOUT VOUT = 2.8 V
Typical performance characteristics LD39115Jxx
16/23 Doc ID 15527 Rev 5
Figure 34. Load transient (VOUT = 1.2 V) Figure 35. Load transient (VOUT = 2.8 V)
VIN = 2. 2 V, IOUT = from 1 to 150 mA, tRISE/FALL = 5 µs
Vin = 3.8 V, IOUT = from 1 to 150 mA, tRISE/FALL = 5 µs
Figure 36. ESR required for stability with
ceramics capacitors
IOUT
VOUT
VOUT = 1.2 V
IOUT
VOUT
VOUT = 1.2 V
IOUT
VOUT VOUT = 2.8 V
IOUT
VOUT VOUT = 2.8 V
0
0.25
0.5
0.75
1
1.25
1.5
1.75
2
2.25
2.5
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
COUT [µF] (nominal value)
ESR @ 100 kHz[ohm]
STABLE ZONE
UNSTABLE ZONE
IOUT = from 1 mA to 150 mA, CIN = 1µF (ceramic)
LD39115Jxx Package mechanical data
Doc ID 15527 Rev 5 17/23
7 Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Package mechanical data LD39115Jxx
18/23 Doc ID 15527 Rev 5
Dim. mm.
Min. Typ. Max.
A 0.52 0.56 0.60
A1 0.17 0.20 0.23
A2 0.35 0.36 0.37
b0.230.25 0.29
D 0.7580.788 0.818
D1 0.4
E 0.7580.788 0.818
E1 0.4
SD 0.180.2 0.22
SE 0.180.2 0.22
f0.199
ccc 0.075
Flip-chip 4 mechanical data
7504896/M
LD39115Jxx Package mechanical data
Doc ID 15527 Rev 5 19/23
Dim.
mm. inch.
Min. Typ. Max. Min. Typ. Max.
A 1786.926
C 12.813.2 0.504 0.519
D 20.2 0.795
N5960 61 2.3232.362 2.401
T8.4 0.331
Ao 0.82 0.87 0.92 0.032 0.034 0.036
Bo 0.82 0.87 0.92 0.032 0.034 0.036
Ko 0.64 0.690.74 0.025 0.027 0.029
Po 3.94 4.1 0.1530.157 0.161
P3.94 4.1 0.1530.157 0.161
Tape and reel Flip-chip 4 mechanical data
Package mechanical data LD39115Jxx
20/23 Doc ID 15527 Rev 5
Figure 37. Foot print data
LD39115Jxx Different output voltage versions of the LD39115Jxx available on request
Doc ID 15527 Rev 5 21/23
8 Different output voltage versions of the LD39115Jxx
available on request
Table 7. Options available on request
Order codes Output voltages
LD39115J08R 0.8 V
LD39115J10R 1.0 V
Revision history LD39115Jxx
22/23 Doc ID 15527 Rev 5
9 Revision history
Table 8. Document revision history
Date Revision Changes
26-Mar-2009 1 Initial release.
12-Jun-2009 2 Modified: Table 1 on page 1 and Table 7 on page 21.
05-Aug-2009 3 Modified: tape and reel mechanical data on page 19.
17-May-2011 4 Modified: Table 1 on page 1 and Table 7 on page 21.
20-Dec-2011 5 Added: new order code LD39115J25R Table 1 on page 1.
LD39115Jxx
Doc ID 15527 Rev 5 23/23
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