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LD39115JXX LD39115SJxx
150 mA low quiescent current low noise voltage regulator
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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 A typ. at no load, 35 A typ. at 150 mA load, 1 A max in off mode) Very low noise (33 VRMS 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 F Internal current and thermal limit Flip-chip 4 bumps 0.8 x 0.8 mm. pitch Temperature range: -40 C to 125 C
Flip-chip 4

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 stablized with a ceramic capacitor. The ultra low drop voltage, low quiescent current and low noise features make it suitable for low power batterypowered 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 A. The device also includes a short-circuit constant current limiting and thermal protection.
Applications

Mobile phones Personal digital assistants (PDAs) Cordless phones and similar battery-powered systems
Table 1.
Device summary
Part numbers LD39115JXX12 LD39115SJXX12 LD39115JXX13 LD39115JXX28 LD39115JXX33 Order codes LD39115J12R LD39115SJ12R LD39115J13R LD39115J28R LD39115J33R Rev 1 Output voltages 1.2 V 1.2 V 1.5 V 2.8 V 3.3 V 1/23
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March 2009
Contents
LD39115JXX, LD39115SJxx
Contents
1
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Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Different output voltage versions of the LD39115JXX, LD39115SJxx available on request . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2
3 4 5 6 7 8
9
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LD39115JXX, LD39115SJxx
Diagram
1
Figure 1.
Diagram
Block diagram
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IN
OUT
BandGap 1.22 V
R1 Trimming
Thermal Protection
R2
Enable EN GND
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Pin configuration
LD39115JXX, LD39115SJxx
2
Figure 2.
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Pin configuration
Pin connection (top view)
Table 2.
Pin n A2 A1 B2 B1
Pin description
Symbol EN GND IN OUT Function Enable pin logic input: Low = shutdown, High = active Common ground Input voltage of the LDO Output voltage
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LD39115JXX, LD39115SJxx
Typical application
3
Figure 3.
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Typical application
Typical application circuit
VIN 1 F
IN
OUT 1 F
VOUT Load
VEN
EN
GND
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Maximum ratings
LD39115JXX, LD39115SJxx
4
Table 3.
Symbol
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IN
Maximum ratings
Absolute maximum ratings
Parameter DC input voltage DC output voltage Enable input voltage Output current Power dissipation Storage temperature range Operating junction temperature range Value - 0.3 to 6 - 0.3 to VI + 0.3 - 0.3 to VI + 0.3 Internally limited Internally limited - 65 to 150 - 40 to 125 Unit V V V mA mW C C
VOUT VEN IOUT PD TSTG TOP
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. Thermal data
Parameter Thermal resistance junction-ambient Value 180 Unit C/W
Table 4.
Symbol RthJA
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LD39115JXX, LD39115SJxx
Electrical characteristics
5
Electrical characteristics
TJ = 25 C, VIN = VOUT(NOM) + 1 V, CIN = COUT = 1 F, IOUT = 1 mA, VEN = VIN, unless otherwise specified.
www..com Table 5.
Electrical characteristics for LD39115JXX (1)
Parameter Operating input voltage Turn-on threshold Test conditions Min. 1.5 1.45 1.30 VOUT>1.5V, IOUT=1mA, TJ=25C VOUT>1.5V, IOUT=1mA, -40CSymbol VIN VUVLO
Turn-off threshold
VOUT
VOUT accuracy
VOUT VOUT VOUT VOUT VDROP eN
Static line regulation
VOUT +1V VIN 5.5V, IOUT=1mA
Transient line regulation VIN=+500mV, IOUT=1mA, (2) TR=TF=5s Static load regulation Transient load regulation (2) Dropout voltage (3) Output noise voltage IOUT=1mA to 150mA IOUT=1mA to 150mA, tR=tF=5s IOUT=100mA, VOUT>1.5V -40CSVR
VIN=VOUTNOM+1V+/-VRIPPLE VRIPPLE=0.1V Freq.=1kHz IOUT = 10mA Supply voltage rejection VOUT = 1.5V +0.5V+/-V V =V
IN OUTNOM
RIPPLE
VRIPPLE=0.1V Freq.=10kHz IOUT=10mA IOUT=0mA IOUT=0mA, -40CEnable pin input current VSHDN=VIN Turn on time
(4)
Electrical characteristics Table 5.
Symbol TSHDN
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OUT
LD39115JXX, LD39115SJxx
Electrical characteristics for LD39115JXX (continued) (1)
Parameter Thermal shutdown Hysteresis Output capacitor Capacitance (see Section 6: Typical performance characteristics) 1 Test conditions Min. Typ. 160 C 20 22 F Max. Unit
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.
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LD39115JXX, LD39115SJxx
Electrical characteristics
TJ = 25 C, VIN = VOUT(NOM) + 1 V, CIN = COUT = 1 F, IOUT = 1 mA, VEN = VIN, unless otherwise specified. Table 6.
Symbol VIN www..com VUVLO
Electrical characteristics for LD39115SJxx (1)
Parameter Operating input voltage Turn-on threshold Turn-off threshold VOUT >1.5V, IOUT=1mA, TJ=25C VOUT >1.5V, IOUT=1mA, -40CVOUT
VOUT accuracy
VOUT VOUT VOUT VOUT VDROP eN
Static line regulation Transient line regulation
(2)
VOUT +1V VIN 5.5V, IOUT=1mA VIN=+500mV, IOUT=1mA, TR=TF=5s IOUT = 1mA to 150mA IOUT = 1mA to 150mA, TR=TF=5us IOUT = 100mA, VOUT>1.5V -40CStatic load regulation Transient load regulation (2) Dropout voltage (3) Output noise voltage
SVR
VIN = VOUTNOM+1V+/-VRIPPLE VRIPPLE = 0.1V Freq.=1kHz Supply voltage rejection IOUT=10mA VOUT = 1.5V +0.5V+/-V V =V
IN OUTNOM
74 dB 67 20 50 35 70 0.001 200 0.4 V 0.9 0.1 100 100 nA s 1 mA A
RIPPLE
VRIPPLE=0.1V Freq.=10kHz IOUT=10mA IOUT=0mA IOUT=0mA, -40CEnable pin input current VSHDN=VIN Turn on time (4)
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Electrical characteristics Table 6.
Symbol TSHDN
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OUT
LD39115JXX, LD39115SJxx
Electrical characteristics for LD39115SJxx (continued) (1)
Parameter Thermal shutdown Hysteresis Output capacitor Capacitance (see Section 6: Typical performance characteristics) 1 Test conditions Min. Typ. 160 C 20 22 F Max. Unit
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.
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LD39115JXX, LD39115SJxx
Typical performance characteristics
6
Typical performance characteristics
(CIN = COUT = 1 F, VEN to VIN)
Figure 4.
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1.3 1.28 1.26 1.24 VOUT [V] 1.22 1.2 1.18 1.16 1.14 1.12 1.1 -75
Output voltage vs. temperature
Figure 5.
3 2.95 2.9 VOUT [V] 2.85 2.8 2.75 2.7
Output voltage vs. temperature
VIN = 2.2 V, IOUT = 1 mA
VIN = 3.8 V, IOUT = 1 mA
VOUT = 1.2 V
2.65 2.6 -75 -50 -25 0 25 50 T [C] 75
VOUT = 2.8 V
-50
-25
0
25
50 T [C]
75
100 125 150 175
100 125 150 175
Figure 6.
0.05
Line regulation vs. temperature
Figure 7.
0.004
Load regulation vs. temperature
VIN = from 2.2 V to 5.5 V, IOUT = 1 mA
0.0035 Load [%/mA] 0.003 0.0025 0.002 0.0015 0.001 0.0005
VIN = 2.2 V, IOUT = from 1 to 150 mA
0.04 Line [%/V] 0.03
VOUT=1.2V
0.02 0.01 0 -75 -50 -25 0 25 50 T [C] 75 100 125 150 175
0 -75 -50 -25 0 25 50 T [C] 75
VOUT=1.2 V
100 125 150 175
Figure 8.
Short-circuit current vs. drop voltage
Figure 9.
Dropout voltage vs. temperature
0.09
0.45 0.4 0.35 0.3 ISC [A] 0.25 0.2 0.15 0.1 0.05 0 0 1 2 3 DROP [V] 4 5 6
CIN = 1 F COUT = 1 F(+ 10 F electrolitycs) 125
0.08 VDROPOUT [V] 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0
IOUT = 0.1 A
85 55 25 0 -25 -40
VOUT = 2.8 V
-75 -50 -25
0
25
50
75
100 125 150 175
TEMPERATURE [C]
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Typical performance characteristics
LD39115JXX, LD39115SJxx
Figure 10. Dropout voltage vs. output current Figure 11. Output voltage vs. input voltage
0.14 0.12 VDROPOUT [V] 0.1 www..com
VOUT [V] 1.4 1.2
IOUT = 0.15 A
125 85 55 25 0 -25 -40
VOUT = 1.3 V
1 0.8 0.6 0.4 0.2
0.08 0.06 0.04 0.02
VOUT = 2.8 V
0 0 1 2 3 VIN [V] 4 5 6
0 0 0.05 0.1 0.15 IOUT [A] 0.2 0.25
Figure 12. Output voltage vs. input voltage
Figure 13. Output voltage vs. input voltage
1.4 1.2 1 VOUT [V] 0.8 0.6 0.4 0.2
VOUT = 1.3 V IOUT = 0.15 A
125 85 55
3
IOUT = 0.15 A
125 85 55
2.5 VOUT [V] 2 1.5 1
VOUT = 2.8 V
25 0 -25 -40
25 0 -25 -40
0.5 0
0 1 2 3 VIN [V] 4 5 6
0
0
1
2
3 VIN [V]
4
5
6
Figure 14. Enable threshold vs. temperature
1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0
Figure 15. Quiescent current vs. temperature
45 40 35 IQ [A] 30 25 20 15 10
VIN = 2.2 V, No Load
VEN [V]
VIN = 2.2 V, IOUT = 1 mA
5 0
75 100 125 150 175
VOUT = 1.2 V
-75 -50 -25
0
25
50
-75 -50 -25
0
25
50
75
100 125 150 175
TEMPERATURE [C]
TEMPERATURE [C]
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LD39115JXX, LD39115SJxx
Typical performance characteristics
Figure 16. Quiescent current vs. temperature
70 60
VIN = 2.2 V, IOUT = 0.15 A
Figure 17. Quiescent current vs. temperature
70
VIN = 3.8 V, IOUT = 0.15 A
60 50 IQ [A] 40 30 20
VOUT = 1.2 V
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IQ [A] 40 30 20 10 0 -75 -50 -25 0 25 50 75 100 125 150 175 TEMPERATURE [C]
VOUT = 2.8 V
10 0 -75 -50 -25 0 25 50 75 100 125 150 175 TEMPERATURE [C]
Figure 18. Quiescent current vs. input voltage Figure 19. Quiescent current vs. output current
25 22.5 20 17.5 15 12.5 10 7.5 5 2.5 0 0
50 45 40 35 30 25 20 15 10 5 0 0
IOUT = 1 mA
VIN = 2.3 V
IQ [A]
VOUT = 1.3 V
IQ [A]
VOUT = 2.8 V
0.5 1
1.5 2
2.5 3
3.5 4
4.5 5
5.5 6
0.025 0.05 0.075 0.1 0.125 0.15 0.175 0.2 0.225 IOUT [A]
VIN [V]
Figure 20. Supply voltage rejection vs. temperature
Figure 21. Supply voltage rejection vs. temperature
100
100
VIN from 2.1 V to 2.3 V IOUT = 10 mA, Freq. = 1 kHz
VIN from 2.2 V to 2.4 V, IOUT = 10 mA, Freq. = 1 kHz
90 SVR [dB]
90 SVR [dB]
VOUT = 1.2 V
80 70 60 50 40 -75 -50 -25 0 25 50 T [C] 75 100 125 150 175
80 70 60
VOUT = 1.3 V
50 40 -75 -50 -25 0 25 50 T [C] 75 100 125 150 175
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Typical performance characteristics
LD39115JXX, LD39115SJxx
Figure 22. Supply voltage rejection vs. temperature
Figure 23. Supply voltage rejection vs. temperature
100
100
VIN from 3.7 V to 3.9 V, IOUT = 10 mA, Freq. = 1 kHz VIN from 1.7 V to 1.9 V, IOUT = 10 mA, Freq. = 10 kHz
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90 80 70 60 50 SVR [dB]
90 SVR [dB] 80 70 60 50
VOUT = 2.8 V VOUT = 1.3 V
40 -75 -50 -25 0 25 50 T [C] 75 100 125 150 175
40 -75 -50 -25 0 25 50 T [C] 75 100 125 150 175
Figure 24. Supply voltage rejection vs. temperature
Figure 25. Supply voltage rejection vs. frequency
100
VIN from 3.2 V to 3.4 V, IOUT = 10 mA, Freq. = 10 kHz
90
70 60
VOUT = 2.8 V
SVR [dB]
SVR [dB]
80
50 40 -75 -50 -25 0 25 50 T [C] 75 100 125 150 175
100 90 80 70 60 50 40 30 20 10 0 0 10 20
VIN from 2.1 V to 2.3 V, IOUT = 10 mA
VOUT = 1.2 V
30
40
50
60
70
80
90 100 110
Frequency [kHz]
Figure 26. Supply voltage rejection vs. frequency
100 90 80 70 60 50 40 30 20 10 0 0 10
Figure 27. Supply voltage rejection vs. frequency
100 90 80 70 60 50 40 30 20 10 0 0
VIN from 1.7 V to 1.9 V, IOUT = 10 mA
VIN from 3.2 V to 3.4 V, IOUT = 10 mA
SVR [dB]
SVR [dB]
VOUT = 1.3 V
VOUT = 2.8 V
20
30
40
50
60
70
80
90 100 110
10 20 30 40 50 60 70 80 90 100 110 120 Frequency [kHz]
Frequency [KHz]
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LD39115JXX, LD39115SJxx
Typical performance characteristics
Figure 28. Supply voltage rejection vs. output Figure 29. LD39115J noise current
100 90
VIN from 1.7 V to 1.9 V, F = 10 kHz
1 Noise [V/SQRT(Hz)] 0.8 0.6 0.4 0.2 0 0 20000 40000 60000 80000 100000
VOUT = 1.3 V, VIN = 2.3 V, TA = 25 C
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70 SVR [dB] 60 50 40 30 20 10 0 0 0.025 0.05 0.075 0.1 0.125 0.15 0.175 0.2 0.225 0.25
VOUT = 1.3 V
Freq [Hz]
IOUT [A]
Figure 30. Line regulation transient
Figure 31. Start up transient
VIN
VIN
VOUT
VOUT
VIN from 2.2 V to 2.7 V, IOUT = 1 mA, COUT = 1 F, No CIN tRISE/FALL = 5 s
VIN from 0 to 2.3 V, IOUT = 1 mA COUT = 1 F No CIN, tRISE = 60 s
Figure 32. Enable transient
Figure 33. Enable transient
VEN
VOUT = 1.2 V
VEN
VOUT
VOUT
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 s
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Typical performance characteristics
LD39115JXX, LD39115SJxx
Figure 34. Load transient
Figure 35. Load transient
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IOUT
VOUT = 1.2 V
VOUT
VOUT
VOUT = 2.8 V
VIN = 2. 2 V, IOUT = from 1 to 150 mA, tRISE/FALL = 5 s
Vin = 3.8 V, IOUT = from 1 to 150 mA, tRISE/FALL = 5 s
Figure 36. ESR required for stability with ceramics capacitors
2.5 2.25 2 1.75 1.5 1.25 1 0.75 0.5 0.25 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
UNSTABLE ZONE
IOUT = from 1 mA to 150 mA, CIN = 1F (ceramic)
ESR @ 100 kHz[ ]
STABLE ZONE
COUT [F] (nominal value)
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LD39115JXX, LD39115SJxx
Package mechanical data
7
Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK(R) packages, depending on their level of environmental compliance. ECOPACK(R) specifications, grade definitions and product status are available at: www.st.com. ECOPACK is an ST trademark.
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Package mechanical data
LD39115JXX, LD39115SJxx
Flip-chip 4 mechanical data
Dim.
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mm. Min. 0.52 0.17 0.35 0.23 0.758 Typ. 0.56 0.20 0.36 0.25 0.788 0.4 0.758 0.788 0.4 0.18 0.18 0.2 0.2 0.199 0.075 0.22 0.22 0.818 Max. 0.60 0.23 0.37 0.29 0.818
A A1 A2 b D D1 E E1 SD SE f ccc
7504896/M
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LD39115JXX, LD39115SJxx
Package mechanical data
Tape and reel Flip-chip 4 mechanical data
mm. Dim.
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inch. Max. 178 Min. Typ. Max. 6.926 0.504 0.795 0.519
Min.
Typ.
A C D N T Ao Bo Ko Po P 1.12 1.12 0.68 3.9 3.9 1.17 1.17 0.73 4 4 12.8 20.2 59 60
13.2
61 8.4 1.22 1.22 0.78 4.1 4.1
2.323
2.362
2.401 0.331
0.044 0.044 0.027 0.153 0.153
0.046 0.046 0.029 0.157 0.157
0.048 0.048 0.031 0.161 0.161
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Package mechanical data
LD39115JXX, LD39115SJxx
Figure 37. Foot print data
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20/23
LD39115JXX, LD39115SJxx
Different output voltage versions of the LD39115JXX, LD39115SJxx
8
Different output voltage versions of the LD39115JXX, LD39115SJxx available on request
Options available on request
Order codes LD39115J08R LD39115J10R LD39115J15R LD39115J18R Output voltages 0.8 V 1.0 V 1.5 V 1.8 V
Table 7.
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Revision history
LD39115JXX, LD39115SJxx
9
Table 8.
Date
Revision history
Document revision history
Revision 1 Initial release. Changes
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LD39115JXX, LD39115SJxx
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