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LP2985A-10 [TI]

150-mA Low-noise Low-dropout Regulator With Shutdown;
LP2985A-10
型号： LP2985A-10
厂家： TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述：

150-mA Low-noise Low-dropout Regulator With Shutdown
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LP2985  
SLVS522O –JULY 2004–REVISED JANUARY 2015  
LP2985 150-mA Low-noise Low-dropout Regulator With Shutdown  
1 Features  
3 Description  
The LP2985 family of fixed-output, low-dropout  
regulators offers exceptional, cost-effective  
performance for both portable and nonportable  
applications. Available in voltages of 1.8 V, 2.5 V, 2.8  
V, 2.9 V, 3 V, 3.1 V, 3.3 V, 5 V, and 10 V, the family  
has an output tolerance of 1% for the A version (1.5%  
for the non-A version) and is capable of delivering  
150-mA continuous load current. Standard regulator  
features, such as overcurrent and overtemperature  
protection, are included.  
1
•
Output Tolerance of  
–
–
1% (A Grade)  
1.5% (Standard Grade)  
•
Ultra-Low Dropout, Typically  
–
–
280 mV at Full Load of 150 mA  
7 mV at 1 mA  
•
•
•
•
Wide VIN Range: 16 V Max  
Low IQ: 850 μA at Full Load at 150 mA  
Shutdown Current: 0.01 μA Typ  
Device Information(1)  
Low Noise: 30 μVRMS With 10-nF Bypass  
PART NUMBER  
LP2985  
PACKAGE  
BODY SIZE (NOM)  
Capacitor  
SOT-23 (5)  
2.90 mm x 1.60 mm  
•
Stable With Low-ESR Capacitors, Including  
Ceramic  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
•
•
•
Overcurrent and Thermal Protection  
High Peak-Current Capability  
Dropout Voltage vs Temperature  
0.45  
ESD Protection Exceeds JESD 22  
150 mA  
V
O
= 3.3 V  
C
byp  
= 10 nF  
–
–
2000-V Human-Body Model (A114-A)  
200-V Machine Model (A115-A)  
0.4  
0.35  
0.3  
2 Applications  
•
•
•
•
Portable Devices  
Digital Cameras and Camcorders  
CD Players  
0.25  
0.2  
50 mA  
10 mA  
MP3 Players  
0.15  
0.1  
0.05  
0
1 mA  
100 125 150  
−50  
−25  
0
25  
50  
75  
Temperature − (°C)  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
 
LP2985  
SLVS522O –JULY 2004–REVISED JANUARY 2015  
www.ti.com  
Table of Contents  
7.2 Functional Block Diagram ....................................... 11  
7.3 Feature Description................................................. 11  
7.4 Device Functional Modes........................................ 11  
Application and Implementation ........................ 12  
8.1 Application Information............................................ 12  
Power Supply Recommendations...................... 16  
1
2
3
4
5
6
Features.................................................................. 1  
Applications ........................................................... 1  
Description ............................................................. 1  
Revision History..................................................... 2  
Pin Configuration and Functions......................... 3  
Specifications......................................................... 4  
6.1 Absolute Maximum Ratings ..................................... 4  
6.2 ESD Ratings.............................................................. 4  
6.3 Recommended Operating Conditions...................... 4  
6.4 Thermal Information.................................................. 4  
6.5 Electrical Characteristics.......................................... 5  
6.6 Typical Characteristics.............................................. 7  
Detailed Description ............................................ 11  
7.1 Overview ................................................................. 11  
8
9
10 Layout................................................................... 17  
10.1 Layout Guidelines ................................................. 17  
10.2 Layout Example .................................................... 17  
11 Device and Documentation Support ................. 17  
11.1 Trademarks........................................................... 17  
11.2 Electrostatic Discharge Caution............................ 17  
11.3 Glossary................................................................ 17  
7
12 Mechanical, Packaging, and Orderable  
Information ........................................................... 17  
4 Revision History  
Changes from Revision N (June 2011) to Revision O  
Page  
•
Added Applications, Device Information table, Pin Functions table, ESD Ratings table, Thermal Information table,  
Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply  
Recommendations section, Layout section, Device and Documentation Support section, and Mechanical,  
Packaging, and Orderable Information section. ..................................................................................................................... 1  
•
Deleted Ordering Information table. ....................................................................................................................................... 1  
2
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SLVS522O –JULY 2004–REVISED JANUARY 2015  
5 Pin Configuration and Functions  
DBV (SOT-23) PACKAGE  
(TOP VIEW)  
1
2
3
5
4
VIN  
VOUT  
GND  
ON/OFF  
BYPASS  
Pin Functions  
PIN  
TYPE  
DESCRIPTION  
NAME  
BYPASS  
GND  
NO.  
4
I/O  
—
I
Attach a 10-nF capacitor to improve low-noise performance.  
2
Ground  
ON/OFF  
VIN  
3
Active-low shutdown pin. Tie to VIN if unused.  
Supply input  
1
I
VOUT  
5
O
Voltage output  
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SLVS522O –JULY 2004–REVISED JANUARY 2015  
www.ti.com  
6 Specifications  
6.1 Absolute Maximum Ratings  
over virtual junction temperature range (unless otherwise noted)(1)  
MIN  
–0.3  
MAX  
16  
UNIT  
VIN  
Continuous input voltage range(2)  
ON/OFF input voltage range  
Output voltage range(3)  
V
V
V
VON/ OFF  
–0.3  
16  
–0.3  
9
Internally limited  
(short-circuit protected)  
IO  
Output current(4)  
—
θJA  
TJ  
Package thermal impedance(4) (5)  
Operating virtual junction temperature  
Storage temperature range  
206  
°C/W  
°C  
150  
150  
Tstg  
–65  
°C  
(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings  
only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating  
Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.  
(2) The PNP pass transistor has a parasitic diode connected between the input and output. This diode normally is reverse biased  
(VIN > VOUT), but will be forward biased if the output voltage exceeds the input voltage by a diode drop (see Application Information for  
more details).  
(3) If load is returned to a negative power supply in a dual-supply system, the output must be diode clamped to GND.  
(4) Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient  
temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.  
(5) The package thermal impedance is calculated in accordance with JESD 51-7.  
6.2 ESD Ratings  
VALUE  
UNIT  
Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins(1)  
2000  
V(ESD)  
Electrostatic discharge  
V
Charged device model (CDM), per JEDEC specification JESD22-C101,  
all pins(2)  
1000  
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.  
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.  
6.3 Recommended Operating Conditions  
MIN  
2.2(1)  
MAX  
16  
UNIT  
V
VIN  
Supply input voltage  
ON/OFF input voltage  
Output current  
VON/ OFF  
IOUT  
TJ  
0
VIN  
V
150  
125  
mA  
°C  
Virtual junction temperature  
–40  
(1) Recommended minimum VIN is the greater of 2.5 V or VOUT(max) + rated dropout voltage (max) for operating IL.  
6.4 Thermal Information  
LP2985  
DBV  
THERMAL METRIC(1)  
UNIT  
5 PINS  
RθJA  
Junction-to-ambient thermal resistance  
206  
°C/W  
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.  
4
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6.5 Electrical Characteristics  
at specified virtual junction temperature range, VIN = VOUT(NOM) + 1 V, VON/ OFF = 2 V, CIN = 1 μF, IL = 1 mA, COUT = 4.7 μF  
(unless otherwise noted)  
LP2985A-xx  
LP2985-xx  
PARAMETER  
TEST CONDITIONS  
IL = 1 mA  
TJ  
UNIT  
%VNOM  
%/V  
MIN  
TYP MAX  
MIN  
TYP MAX  
25°C  
25°C  
–1  
–1.5  
–2.5  
–2.5  
–3.5  
1
–1.5  
–2.5  
–3.5  
–3  
1.5  
1.5  
2.5  
1 mA ≤ IL ≤ 50 mA  
1 mA ≤ IL ≤ 150 mA  
VIN = [VOUT(NOM) + 1 V] to 16 V  
IL = 0  
Output voltage  
tolerance  
ΔVOUT  
–40°C to 125°C  
25°C  
2.5  
2.5  
3.5  
3
4
–40°C to 125°C  
25°C  
3.5  
–4  
0.007 0.014  
0.032  
0.007 0.014  
0.032  
Line regulation  
–40°C to 125°C  
25°C  
1
3
5
1
3
5
–40°C to 125°C  
25°C  
7
10  
7
10  
IL = 1 mA  
–40°C to 125°C  
25°C  
15  
15  
40  
60  
40  
60  
VIN – VOUT Dropout voltage(1)  
IL = 10 mA  
mV  
–40°C to 125°C  
25°C  
90  
90  
120  
280  
65  
150  
225  
350  
575  
95  
120  
280  
65  
150  
225  
350  
575  
95  
IL = 50 mA  
–40°C to 125°C  
25°C  
IL = 150 mA  
–40°C to 125°C  
25°C  
25°C (LP2985-10)  
–40°C to 125°C  
125  
125  
125  
125  
IL = 0  
–40°C to 125°C  
(LP2985-10)  
160  
160  
25°C  
25°C (LP2985-10)  
–40°C to 125°C  
25°C  
75  
120  
350  
110  
140  
170  
220  
250  
400  
600  
650  
1000  
75  
120  
350  
110  
140  
170  
220  
250  
400  
600  
650  
1000  
IL = 1 mA  
IL = 10 mA  
IL = 50 mA  
IL = 150 mA  
25°C (LP2985-10)  
–40°C to 125°C  
25°C  
IGND  
GND pin current  
μA  
25°C (LP2985-10)  
–40°C to 125°C  
25°C  
850 1500  
1800  
850 1500  
1800  
25°C (LP2985-10)  
–40°C to 125°C  
25°C  
2500  
2500  
VON/ OFF < 0.3 V (OFF)  
VON/ OFF < 0.15 V (OFF)  
0.01  
0.05  
0.8  
2
0.01  
0.05  
0.8  
2
–40°C to 105°C  
–40°C to 125°C  
25°C  
5
5
1.4  
0.55  
0.01  
5
1.4  
0.55  
0.01  
5
VON/ OFF = HIGH → O/P ON  
VON/ OFF = LOW → O/P OFF  
VON/ OFF = 0  
–40°C to 125°C  
25°C  
1.6  
1.6  
VON/ OFF  
ON/OFF input voltage(2)  
ON/OFF input current  
V
–40°C to 125°C  
25°C  
0.15  
–2  
0.15  
–2  
–40°C to 125°C  
25°C  
ION/ OFF  
μA  
VON/ OFF = 5 V  
–40°C to 125°C  
15  
15  
(1) Dropout voltage is defined as the input-to-output differential at which the output voltage drops 100 mV below the value measured with a  
1-V differential.  
(2) The ON/OFF input must be driven properly for reliable operation (see Application Information).  
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Electrical Characteristics (continued)  
at specified virtual junction temperature range, VIN = VOUT(NOM) + 1 V, VON/ OFF = 2 V, CIN = 1 μF, IL = 1 mA, COUT = 4.7 μF  
(unless otherwise noted)  
LP2985A-xx  
MIN TYP MAX  
LP2985-xx  
MIN TYP MAX  
PARAMETER  
TEST CONDITIONS  
TJ  
UNIT  
BW = 300 Hz to 50 kHz,  
COUT = 10 μF,  
CBYPASS = 10 nF  
Vn  
Output noise (RMS)  
Ripple rejection  
25°C  
25°C  
30  
45  
30  
45  
μV  
ΔVOUT  
ΔVIN  
/
f = 1kHz, COUT = 10 μF,  
CBYPASS = 10 nF  
dB  
IOUT(PK)  
IOUT(SC)  
Peak output current  
Short-circuit current  
V
OUT ≥ VO(NOM) – 5%  
25°C  
25°C  
350  
400  
350  
400  
mA  
mA  
RL = 0 (steady state)(3)  
(3) See Figure 6 in Typical Performance Characteristics.  
6
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6.6 Typical Characteristics  
CIN = 1 μF, COUT = 4.7 μF, VIN = VOUT(NOM) + 1 V, TA = 25°C, ON/OFF pin tied to VIN (unless otherwise specified)  
3.345  
3.335  
3.325  
10.20  
10.15  
10.10  
10.05  
10.00  
9.95  
V = 4.3 V  
I
VI = 11 V  
VO = 10 V  
CI = 1 µF  
CO = 4.7 µF  
IO = 1 mA  
V
= 3.3 V  
C = 1 mF  
O
i
C
= 4.7 mF  
= 1 mA  
o
I
O
3.315  
3.305  
3.295  
9.90  
9.85  
−50 −25  
0
25  
50  
75  
100  
125 150  
-50  
-25  
0
25  
50  
75  
100 125 150  
Temperature − (°C)  
Temperature – °C  
Figure 2. Output Voltage vs Temperature  
Figure 1. Output Voltage vs Temperature  
0.45  
0.4  
0.5  
0.45  
0.4  
V = 6 V  
I
150 mA  
V
= 3.3 V  
O
V
= 3.3 V  
C = 1 mF  
C
= 10 nF  
O
byp  
i
C
byp  
= 0.01 mF  
0.35  
0.3  
0.35  
0.3  
0.25  
0.2  
0.25  
0.2  
50 mA  
10 mA  
0.15  
0.1  
0.15  
0.1  
0.05  
0
0.05  
1 mA  
100 125 150  
0
−500  
−50  
−25  
0
25  
50  
75  
0
500  
1000  
1500  
2000  
Temperature − (°C)  
Time − (ms)  
Figure 3. Dropout Voltage vs Temperature  
Figure 4. Short-circuit Current vs Time  
0.5  
320  
300  
V = 16 V  
I
V
O
= 3.3 V  
V
= 3.3 V  
C = 1 mF  
O
0.45  
0.4  
i
C
byp  
= 0.01 mF  
0.35  
0.3  
280  
0.25  
0.2  
260  
240  
0.15  
0.1  
220  
200  
0.05  
0
−100  
100  
300  
500  
700  
0
0.5  
1
1.5  
2
2.5  
3
3.5  
Time − (ms)  
Output Voltage − (V)  
Figure 5. Short-circuit Current vs Time  
Figure 6. Short-circuit Current vs Output Voltage  
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Typical Characteristics (continued)  
CIN = 1 μF, COUT = 4.7 μF, VIN = VOUT(NOM) + 1 V, TA = 25°C, ON/OFF pin tied to VIN (unless otherwise specified)  
1200  
1100  
1000  
900  
800  
700  
600  
500  
400  
300  
200  
100  
0
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
V
= 3.3 V  
O
V = 5 V  
I
C
= 10 nF  
byp  
V
= 3.3 V  
= 10 mF  
O
C
C
o
= 0 nF  
byp  
50 mA  
1 mA  
150 mA  
20  
40  
60  
80  
100  
120  
140  
160  
10  
100  
1k  
10k  
100k  
1M  
0
Load Current − mA  
Frequency − (Hz)  
Figure 7. Ground Pin Current vs Load Current  
Figure 8. Ripple Rejection vs Frequency  
100  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
V = 3.7 V  
I
V = 5 V  
I
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
V
= 3.3 V  
= 10 mF  
= 0 nF  
V
= 3.3 V  
= 4.7 mF  
= 10 nF  
O
O
C
C
C
C
o
o
byp  
byp  
1 mA  
1 mA  
50 mA  
50 mA  
150 mA  
150 mA  
10  
100  
1k  
10k  
100k  
1M  
10  
100  
1k  
10k  
100k  
1M  
Frequency − (Hz)  
Frequency − (Hz)  
Figure 9. Ripple Rejection vs Frequency  
Figure 10. Ripple Rejection vs Frequency  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
10  
C = 1 mF  
i
V = 5 V  
I
C
= 10 mF  
= 3.3 V  
o
V
= 3.3 V  
= 4.7 mF  
O
V
O
C
C
o
= 10 nF  
byp  
1
1 mA  
1 mA  
10 mA  
100 mA  
10 mA  
0.1  
0.01  
100 mA  
0.001  
10  
100  
1k  
10k  
100k  
1M  
10  
100  
1k  
10k  
100k  
1M  
Frequency − (Hz)  
Frequency − (Hz)  
Figure 11. Ripple Rejection vs Frequency  
Figure 12. Output Impedance vs Frequency  
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Typical Characteristics (continued)  
CIN = 1 μF, COUT = 4.7 μF, VIN = VOUT(NOM) + 1 V, TA = 25°C, ON/OFF pin tied to VIN (unless otherwise specified)  
10  
10  
C = 1 mF  
i
I
= 150 mA  
LOAD  
C
= 4.7 mF  
= 3.3 V  
o
V
O
1
1 mA  
1
10 mA  
100 mA  
C
= 100 pF  
byp  
C
= 1 nF  
byp  
0.1  
0.01  
0.1  
C
byp  
= 10 nF  
0.01  
0.001  
100  
1k  
Frequency − (Hz)  
10k  
100k  
10  
100  
1k  
10k  
100k  
1M  
Frequency − (Hz)  
Figure 14. Output Noise Density vs Frequency  
Figure 13. Output Impedance vs Frequency  
10  
1.8  
I
= 1 mA  
V
O
= 3.3 V  
LOAD  
C
byp  
= 10 nF  
1.6  
1.4  
1.2  
1
R
L
= 3.3 kW  
1
C
byp  
= 100 pF  
C
byp  
= 1 nF  
0.8  
0.6  
0.1  
R
L
= Open  
C
byp  
= 10 nF  
0.4  
0.2  
0
0.01  
100  
1k  
10k  
100k  
0
1
2
3
4
5
6
Frequency − (Hz)  
Input Voltage − (V)  
Figure 15. Output Noise Density vs Frequency  
Figure 16. Input Current vs Input Voltage  
1400  
1200  
1000  
800  
600  
400  
200  
0
V
= 3.3 V  
O
C
= 10 nF  
byp  
150 mA  
1 mA  
0 mA  
50 mA  
10 mA  
−50  
−25  
0
25  
50  
75  
100 125  
150  
Figure 18. 2.2-μF Stable ESR Range  
for Output Voltage ≤ 2.3 V  
Temperature − (°C)  
Figure 17. Ground-pin Current vs Temperature  
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Typical Characteristics (continued)  
CIN = 1 μF, COUT = 4.7 μF, VIN = VOUT(NOM) + 1 V, TA = 25°C, ON/OFF pin tied to VIN (unless otherwise specified)  
Figure 20. 2.2-μF/3.3-μF Stable ESR Range  
for Output Voltage ≥ 2.5 V  
Figure 19. 4.7-μF Stable ESR Range  
for Output Voltage ≤ 2.3 V  
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7 Detailed Description  
7.1 Overview  
The LP2985 family of fixed-output, low-dropout regulators offers exceptional, cost-effective performance for both  
portable and nonportable applications. Available in voltages of 1.8 V, 2.5 V, 2.8 V, 2.9 V, 3 V, 3.1 V, 3.3 V, 5 V,  
and 10 V, the family has an output tolerance of 1% for the A version (1.5% for the non-A version) and is capable  
of delivering 150-mA continuous load current. Standard regulator features, such as overcurrent and  
overtemperature protection, are included.  
7.2 Functional Block Diagram  
V
IN  
ON/OFF  
1.23 V  
V
REF  
−
+
BYPASS  
V
OUT  
Overcurrent/  
Overtemperature  
Protection  
7.3 Feature Description  
The LP2985 has a host of features that makes the regulator an ideal candidate for a variety of portable  
applications:  
•
•
•
•
•
•
Low dropout: A PNP pass element allows a typical dropout of 280 mV at 150-mA load current and 7 mV at 1-  
mA load.  
Low quiescent current: The use of a vertical PNP process allows for quiescent currents that are considerably  
lower than those associated with traditional lateral PNP regulators.  
Shutdown: A shutdown feature is available, allowing the regulator to consume only 0.01 μA when the  
ON/OFF pin is pulled low.  
Low-ESR-capacitor friendly: The regulator is stable with low-ESR capacitors, allowing the use of small,  
inexpensive, ceramic capacitors in cost-sensitive applications.  
Low noise: A BYPASS pin allows for low-noise operation, with a typical output noise of 30 μVRMS, with the  
use of a 10-nF bypass capacitor.  
Small packaging: For the most space-constrained needs, the regulator is available in the SOT-23 package.  
7.4 Device Functional Modes  
7.4.1 Normal Operation  
In normal operation, the device will output a fixed voltage corresponding with the orderable part number. The  
device can deliver 150 mA of continuous load current.  
7.4.2 Shutdown Mode  
Set the ON/OFF pin low to shut down the device when VIN is still present. If a shutdown mode is not needed, tie  
the pin to VIN. For proper operation, do not leave ON/OFF unconnected, and apply a signal with a slew rate of  
≥40 mV/μs.  
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8 Application and Implementation  
NOTE  
Information in the following applications sections is not part of the TI component  
specification, and TI does not warrant its accuracy or completeness. TI’s customers are  
responsible for determining suitability of components for their purposes. Customers should  
validate and test their design implementation to confirm system functionality.  
8.1 Application Information  
The following application schematic shows the standard usage of the LP2985 as a low-dropout regulator.  
8.1.1 Typical Application  
LP2985  
V
OUT  
V
IN  
1
5
2.2 µF  
1 µF  
GND  
2
ON/OFF  
3
4
BYPASS  
10 nF  
8.1.2 Design Requirements  
Minimum COUT value for stability (can be increased without limit for improved stability and transient response)  
ON/OFF must be actively terminated. Connect to VIN if shutdown feature is not used.  
Optional BYPASS capacitor for low-noise operation  
8.1.3 Capacitors  
8.1.3.1 Input Capacitor (CIN)  
A minimum value of 1 μF (over the entire operating temperature range) is required at the input of the LP2985. In  
addition, this input capacitor should be located within 1 cm of the input pin and connected to a clean analog  
ground. There are no equivalent series resistance (ESR) requirements for this capacitor, and the capacitance  
can be increased without limit.  
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Application Information (continued)  
8.1.3.2 Output Capacitor (COUT  
)
As an advantage over other regulators, the LP2985 permits the use of low-ESR capacitors at the output,  
including ceramic capacitors that can have an ESR as low as 5 mΩ. Tantalum and film capacitors also can be  
used if size and cost are not issues. The output capacitor also should be located within 1 cm of the output pin  
and be returned to a clean analog ground.  
As with other PNP LDOs, stability conditions require the output capacitor to have a minimum capacitance and an  
ESR that falls within a certain range.  
•
•
Minimum COUT: 2.2 μF (can be increased without limit to improve transient response stability margin)  
ESR range: see Figure 18 through Figure 20  
It is critical that both the minimum capacitance and ESR requirement be met over the entire operating  
temperature range. Depending on the type of capacitors used, both these parameters can vary significantly with  
temperature (see capacitor characteristics).  
8.1.3.3 Noise Bypass Capacitor (CBYPASS  
)
The LP2985 allows for low-noise performance with the use of a bypass capacitor that is connected to the internal  
bandgap reference via the BYPASS pin. This high-impedance bandgap circuitry is biased in the microampere  
range and, thus, cannot be loaded significantly, otherwise, its output – and, correspondingly, the output of the  
regulator – changes. Thus, for best output accuracy, dc leakage current through CBYPASS should be minimized as  
much as possible and never should exceed 100 nA.  
A 10-nF capacitor is recommended for CBYPASS. Ceramic and film capacitors are well suited for this purpose.  
8.1.3.4 Reverse Input-Output Voltage  
There is an inherent diode present across the PNP pass element of the LP2985.  
V
IN  
V
OUT  
With the anode connected to the output, this diode is reverse biased during normal operation, since the input  
voltage is higher than the output. However, if the output is pulled higher than the input for any reason, this diode  
is forward biased and can cause a parasitic silicon-controlled rectifier (SCR) to latch, resulting in high current  
flowing from the output to the input. Thus, to prevent possible damage to the regulator in any application where  
the output may be pulled above the input, or the input may be shorted to ground, an external Schottky diode  
should be connected between the output and input. With the anode on output, this Schottky limits the reverse  
voltage across the output and input pins to ∼0.3 V, preventing the regulator’s internal diode from forward biasing.  
Schottky  
V
IN  
V
OUT  
LP2985  
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Application Information (continued)  
8.1.4 Detailed Design Procedure  
8.1.4.1 Capacitor Characteristics  
8.1.4.1.1 Ceramics  
Ceramic capacitors are ideal choices for use on the output of the LP2985 for several reasons. For capacitances  
in the range of 2.2 μF to 4.7 μF, ceramic capacitors have the lowest cost and the lowest ESR, making them  
choice candidates for filtering high-frequency noise. For instance, a typical 2.2-μF ceramic capacitor has an ESR  
in the range of 10 mΩ to 20 mΩ and, thus, satisfies minimum ESR requirements of the regulator.  
Ceramic capacitors have one major disadvantage that must be taken into account – a poor temperature  
coefficient, where the capacitance can vary significantly with temperature. For instance, a large-value ceramic  
capacitor (≥ 2.2 μF) can lose more than half of its capacitance as the temperature rises from 25°C to 85°C. Thus,  
a 2.2-μF capacitor at 25°C drops well below the minimum COUT required for stability, as ambient temperature  
rises. For this reason, select an output capacitor that maintains the minimum 2.2 μF required for stability over the  
entire operating temperature range. Note that there are some ceramic capacitors that can maintain a ±15%  
capacitance tolerance over temperature.  
8.1.4.1.2 Tantalum  
Tantalum capacitors can be used at the output of the LP2985, but there are significant disadvantages that could  
prohibit their use:  
•
In the 1-μF to 4.7-μF range, tantalum capacitors are more expensive than ceramics of the equivalent  
capacitance and voltage ratings.  
•
Tantalum capacitors have higher ESRs than their equivalent-sized ceramic counterparts. Thus, to meet the  
ESR requirements, a higher-capacitance tantalum may be required, at the expense of larger size and higher  
cost.  
•
The ESR of a tantalum capacitor increases as temperature drops, as much as double from 25°C to –40°C.  
Thus, ESR margins must be maintained over the temperature range to prevent regulator instability.  
8.1.4.2 ON/OFF Operation  
The LP2985 allows for a shutdown mode via the ON/OFF pin. Driving the pin LOW (≤ 0.3 V) turns the device  
OFF; conversely, a HIGH (≥ 1.6 V) turns the device ON. If the shutdown feature is not used, ON/OFF should be  
connected to the input to ensure that the regulator is on at all times. For proper operation, do not leave ON/OFF  
unconnected, and apply a signal with a slew rate of ≥ 40 mV/μs.  
8.1.5 Application Curves  
200  
150  
100  
50  
200  
150  
100  
50  
3.4  
3.38  
3.36  
3.34  
3.32  
3.3  
3.4  
3.38  
3.36  
3.34  
3.32  
3.3  
I
I
L
L
V
= 3.3 V  
O
0
V = 3.3 V  
O
0
C = 10 nF  
DI = 100 mA  
byp  
C
= 10 nF  
DI = 150 mA  
byp  
L
−50  
L
−50  
V
O
V
O
−100  
−150  
−200  
−250  
3.28  
3.26  
3.24  
3.22  
−100  
−150  
−200  
−250  
3.28  
3.26  
3.24  
3.22  
20 ms/div→  
20 ms/div→  
Figure 21. Load Transient Response  
Figure 22. Load Transient Response  
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Application Information (continued)  
3.41  
3.39  
3.37  
3.35  
3.33  
3.31  
3.29  
3.27  
5.5  
5
3.4  
200  
150  
3.38  
3.36  
100  
50  
V
I
4.5  
I
L
3.34  
3.32  
3.3  
V
= 3.3 V  
= 0 nF  
= 150 mA  
O
C
I
V
= 3.3 V  
= 0 nF  
DI = 150 mA  
byp  
O
4
0
C
O
byp  
L
−50  
3.5  
V
O
−100  
−150  
−200  
−250  
3.28  
3.26  
V
O
3
2.5  
3.24  
3.22  
2
20 ms/div→  
20 ms/div→  
Figure 24. Line Transient Response  
Figure 23. Load Transient Response  
3.41  
3.39  
3.37  
3.41  
3.39  
5.5  
5.5  
5
5
V
I
4.5  
V
I
4.5  
3.37  
3.35  
V
= 3.3 V  
V
= 3.3 V  
= 0 nF  
= 1 mA  
O
O
4
C
I
= 10 nF  
= 150 mA  
4
C
I
3.35  
3.33  
3.31  
3.29  
3.27  
byp  
byp  
O
O
3.5  
3.5  
3
3.33  
3
3.31  
3.29  
3.27  
2.5  
2.5  
V
O
V
O
2
2
20 ms/div→  
20 ms/div→  
Figure 25. Line Transient Response  
Figure 26. Line Transient Response  
4
3
2
1
10  
8
5.5  
3.41  
3.39  
3.37  
V
O
5
V
IN  
4.5  
6
4
3.35  
3.33  
3.31  
V
= 3.3 V  
O
0
C
I
= 10 nF  
byp  
= 1 mA  
3.5  
O
V
= 3.3 V  
O
4
−1  
C
= 0  
= 150 mA  
byp  
I
O
3
V
−2  
−3  
−4  
O
V
ON/OFF  
2
2.5  
2
3.29  
3.27  
0
100 ms/div→  
100 ms/div→  
Figure 27. Line Transient Response  
Figure 28. Turn-on Time  
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Application Information (continued)  
10  
10  
4
3
4
V
O
V
O
3
2
8
6
4
2
0
8
6
4
2
0
2
1
1
0
0
V
= 3.3 V  
O
V
= 3.3 V  
O
−1  
−2  
−3  
−4  
−1  
C
= 1 nF  
= 150 mA  
byp  
C
= 100 pF  
= 150 mA  
byp  
I
LOAD  
I
LOAD  
V
ON/OFF  
−2  
V
ON/OFF  
−3  
−4  
2 ms/div→  
200 ms/div→  
Figure 30. Turn-on Time  
Figure 29. Turn-on Time  
4
10  
8
Input  
3
2
1
0
6
4
2
0
V
= 3.3 V  
O
−1  
−2  
C
= 10 nF  
= 150 mA  
byp  
I
LOAD  
Output  
−3  
−4  
20 ms/div→  
Figure 31. Turn-on Time  
9 Power Supply Recommendations  
A power supply may be used at the input voltage within the ranges given in the Recommended Operating  
Conditions table. It is recommended to use bypass capacitors as described in Layout Guidelines.  
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SLVS522O –JULY 2004–REVISED JANUARY 2015  
10 Layout  
10.1 Layout Guidelines  
•
•
It is recommended that the input pin be bypassed to ground with a bypass-capacitor.  
The optimum placement of the bypass capacitor is closest to the VIN of the device and GND of the system.  
Care must be taken to minimize the loop area formed by the bypass-capacitor connection, the VIN pin, and  
the GND pin of the system.  
•
For operation at full-rated load, it is recommended to use wide trace lengths to eliminate IR drop and heat  
dissipation.  
10.2 Layout Example  
VIN  
VOUT  
1
2
5
4
1 ꢀF  
2.2 ꢀF  
LP2985  
3
ON/OFF  
tied to VIN  
if not used  
10 nF  
Figure 32. Layout Diagram  
11 Device and Documentation Support  
11.1 Trademarks  
All trademarks are the property of their respective owners.  
11.2 Electrostatic Discharge Caution  
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam  
during storage or handling to prevent electrostatic damage to the MOS gates.  
11.3 Glossary  
SLYZ022 — TI Glossary.  
This glossary lists and explains terms, acronyms, and definitions.  
12 Mechanical, Packaging, and Orderable Information  
The following pages include mechanical, packaging, and orderable information. This information is the most  
current data available for the designated devices. This data is subject to change without notice and revision of  
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.  
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17  
PACKAGE OPTION ADDENDUM  
www.ti.com  
18-Sep-2015  
PACKAGING INFORMATION  
Orderable Device  
LP2985-10DBVR  
LP2985-10DBVT  
LP2985-18DBVR  
LP2985-18DBVRE4  
LP2985-18DBVRG4  
LP2985-18DBVT  
LP2985-18DBVTE4  
LP2985-18DBVTG4  
LP2985-25DBVR  
LP2985-25DBVRG4  
LP2985-25DBVT  
LP2985-25DBVTG4  
LP2985-28DBVR  
LP2985-28DBVT  
Status Package Type Package Pins Package  
Eco Plan  
Lead/Ball Finish  
MSL Peak Temp  
Op Temp (°C)  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
Device Marking  
Samples  
Drawing  
Qty  
(1)  
(2)  
(6)  
(3)  
(4/5)  
ACTIVE  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
DBV  
5
5
5
5
5
5
5
5
5
5
5
5
5
5
3000  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
LRCG  
LRCG  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
250  
3000  
3000  
3000  
250  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
Green (RoHS CU NIPDAU | CU SN  
& no Sb/Br)  
(LPHG ~ LPHL)  
LPHG  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
LPHG  
Green (RoHS CU NIPDAU | CU SN  
& no Sb/Br)  
(LPHG ~ LPHL)  
LPHG  
250  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
250  
Green (RoHS  
& no Sb/Br)  
LPHG  
3000  
3000  
250  
Green (RoHS  
& no Sb/Br)  
(LPLG ~ LPLL)  
(LPLG ~ LPLL)  
(LPLG ~ LPLL)  
(LPLG ~ LPLL)  
(LPGG ~ LPGL)  
(LPGG ~ LPGL)  
Green (RoHS  
& no Sb/Br)  
Green (RoHS  
& no Sb/Br)  
250  
Green (RoHS  
& no Sb/Br)  
3000  
250  
Green (RoHS CU NIPDAU | CU SN  
& no Sb/Br)  
Green (RoHS CU NIPDAU | CU SN  
& no Sb/Br)  
LP2985-28DBVTE4  
LP2985-28DBVTG4  
ACTIVE  
ACTIVE  
SOT-23  
SOT-23  
DBV  
DBV  
5
5
TBD  
Call TI  
Call TI  
-40 to 125  
-40 to 125  
250  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
Level-1-260C-UNLIM  
LPGG  
LP2985-29DBVR  
ACTIVE  
SOT-23  
DBV  
5
3000  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
Level-1-260C-UNLIM  
-40 to 125  
(LPMG ~ LPML)  
Addendum-Page 1  
PACKAGE OPTION ADDENDUM  
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18-Sep-2015  
Orderable Device  
Status Package Type Package Pins Package  
Eco Plan  
Lead/Ball Finish  
MSL Peak Temp  
Op Temp (°C)  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
Device Marking  
Samples  
Drawing  
Qty  
(1)  
(2)  
(6)  
(3)  
(4/5)  
LP2985-30DBVR  
LP2985-30DBVRG4  
LP2985-30DBVT  
ACTIVE  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
DBV  
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
3000  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
(LPNG ~ LPNL)  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
3000  
250  
Green (RoHS  
& no Sb/Br)  
(LPNG ~ LPNL)  
(LPNG ~ LPNL)  
(LPNG ~ LPNL)  
(LPFG ~ LPFL)  
LPFG  
Green (RoHS  
& no Sb/Br)  
LP2985-30DBVTG4  
LP2985-33DBVR  
LP2985-33DBVRE4  
LP2985-33DBVRG4  
LP2985-33DBVT  
250  
Green (RoHS  
& no Sb/Br)  
3000  
3000  
3000  
250  
Green (RoHS CU NIPDAU | CU SN  
& no Sb/Br)  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
LPFG  
Green (RoHS CU NIPDAU | CU SN  
& no Sb/Br)  
(LPFG ~ LPFL)  
LPFG  
LP2985-33DBVTE4  
LP2985-33DBVTG4  
LP2985-50DBVR  
LP2985-50DBVRG4  
LP2985-50DBVT  
250  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
250  
Green (RoHS  
& no Sb/Br)  
LPFG  
3000  
3000  
250  
Green (RoHS  
& no Sb/Br)  
(LPSG ~ LPSL)  
(LPSG ~ LPSL)  
(LPSG ~ LPSL)  
(LPSG ~ LPSL)  
LRDG  
Green (RoHS  
& no Sb/Br)  
Green (RoHS  
& no Sb/Br)  
LP2985-50DBVTG4  
LP2985A-10DBVR  
LP2985A-10DBVT  
LP2985A-18DBVJ  
LP2985A-18DBVR  
250  
Green (RoHS  
& no Sb/Br)  
3000  
250  
Green (RoHS  
& no Sb/Br)  
Green (RoHS  
& no Sb/Br)  
LRDG  
10000 Green (RoHS  
& no Sb/Br)  
LPTL  
3000  
Green (RoHS CU NIPDAU | CU SN  
& no Sb/Br)  
(LPTG ~ LPTL)  
Addendum-Page 2  
PACKAGE OPTION ADDENDUM  
www.ti.com  
18-Sep-2015  
Orderable Device  
Status Package Type Package Pins Package  
Eco Plan  
Lead/Ball Finish  
MSL Peak Temp  
Op Temp (°C)  
Device Marking  
Samples  
Drawing  
Qty  
(1)  
(2)  
(6)  
(3)  
(4/5)  
LP2985A-18DBVRE4  
LP2985A-18DBVRG4  
ACTIVE  
SOT-23  
SOT-23  
DBV  
5
5
TBD  
Call TI  
Call TI  
-40 to 125  
-40 to 125  
ACTIVE  
ACTIVE  
DBV  
DBV  
3000  
250  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
Level-1-260C-UNLIM  
LPTG  
LP2985A-18DBVT  
SOT-23  
5
Green (RoHS CU NIPDAU | CU SN  
& no Sb/Br)  
Level-1-260C-UNLIM  
-40 to 125  
(LPTG ~ LPTL)  
LP2985A-18DBVTE4  
LP2985A-25DBVR  
ACTIVE  
ACTIVE  
SOT-23  
SOT-23  
DBV  
DBV  
5
5
TBD  
Call TI  
Call TI  
-40 to 125  
-40 to 125  
3000  
3000  
250  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
Level-1-260C-UNLIM  
(LPUG ~ LPUL)  
(LPUG ~ LPUL)  
(LPUG ~ LPUL)  
(LPUG ~ LPUL)  
(LPJG ~ LPJL)  
(LPJG ~ LPJL)  
(LPZG ~ LPZL)  
(LRAG ~ LRAL)  
(LRAG ~ LRAL)  
(LRAG ~ LRAL)  
(LPKG ~ LPKL)  
LP2985A-25DBVRG4  
LP2985A-25DBVT  
LP2985A-25DBVTG4  
LP2985A-28DBVR  
LP2985A-28DBVT  
LP2985A-29DBVR  
LP2985A-30DBVR  
LP2985A-30DBVT  
LP2985A-30DBVTG4  
LP2985A-33DBVR  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
5
5
5
5
5
5
5
5
5
5
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
Green (RoHS  
& no Sb/Br)  
250  
Green (RoHS  
& no Sb/Br)  
3000  
250  
Green (RoHS CU NIPDAU | CU SN  
& no Sb/Br)  
Green (RoHS CU NIPDAU | CU SN  
& no Sb/Br)  
3000  
3000  
250  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
Green (RoHS  
& no Sb/Br)  
Green (RoHS  
& no Sb/Br)  
250  
Green (RoHS  
& no Sb/Br)  
3000  
Green (RoHS CU NIPDAU | CU SN  
& no Sb/Br)  
LP2985A-33DBVRE4  
LP2985A-33DBVRG4  
ACTIVE  
ACTIVE  
SOT-23  
SOT-23  
DBV  
DBV  
5
5
TBD  
Call TI  
Call TI  
-40 to 125  
-40 to 125  
3000  
250  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
Level-1-260C-UNLIM  
LPKG  
LP2985A-33DBVT  
ACTIVE  
SOT-23  
DBV  
5
Green (RoHS CU NIPDAU | CU SN  
& no Sb/Br)  
Level-1-260C-UNLIM  
-40 to 125  
(LPKG ~ LPKL)  
Addendum-Page 3  
PACKAGE OPTION ADDENDUM  
www.ti.com  
18-Sep-2015  
Orderable Device  
Status Package Type Package Pins Package  
Eco Plan  
Lead/Ball Finish  
MSL Peak Temp  
Op Temp (°C)  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
Device Marking  
Samples  
Drawing  
Qty  
(1)  
(2)  
(6)  
(3)  
(4/5)  
LP2985A-33DBVTE4  
LP2985A-33DBVTG4  
LP2985A-50DBVR  
LP2985A-50DBVRG4  
LP2985A-50DBVT  
ACTIVE  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
DBV  
5
5
5
5
5
5
250  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
LPKG  
LPKG  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
DBV  
DBV  
DBV  
DBV  
DBV  
250  
3000  
3000  
250  
Green (RoHS  
& no Sb/Br)  
Green (RoHS  
& no Sb/Br)  
(LR1G ~ LR1L)  
(LR1G ~ LR1L)  
(LR1G ~ LR1L)  
(LR1G ~ LR1L)  
Green (RoHS  
& no Sb/Br)  
Green (RoHS  
& no Sb/Br)  
LP2985A-50DBVTG4  
250  
Green (RoHS  
& no Sb/Br)  
(1) The marketing status values are defined as follows:  
ACTIVE: Product device recommended for new designs.  
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.  
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.  
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.  
OBSOLETE: TI has discontinued the production of the device.  
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability  
information and additional product content details.  
TBD: The Pb-Free/Green conversion plan has not been defined.  
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that  
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.  
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between  
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.  
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight  
in homogeneous material)  
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.  
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.  
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation  
of the previous line and the two combined represent the entire Device Marking for that device.  
Addendum-Page 4  
PACKAGE OPTION ADDENDUM  
www.ti.com  
18-Sep-2015  
(6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish  
value exceeds the maximum column width.  
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information  
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and  
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.  
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.  
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.  
Addendum-Page 5  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
29-May-2015  
TAPE AND REEL INFORMATION  
*All dimensions are nominal  
Device  
Package Package Pins  
Type Drawing  
SPQ  
Reel  
Reel  
A0  
B0  
K0  
P1  
W
Pin1  
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant  
(mm) W1 (mm)  
LP2985-10DBVR  
LP2985-10DBVT  
LP2985-18DBVR  
LP2985-18DBVR  
LP2985-18DBVRG4  
LP2985-18DBVT  
LP2985-18DBVTG4  
LP2985-25DBVR  
LP2985-25DBVR  
LP2985-25DBVT  
LP2985-28DBVR  
LP2985-28DBVR  
LP2985-28DBVT  
LP2985-28DBVTG4  
LP2985-29DBVR  
LP2985-29DBVR  
LP2985-30DBVR  
LP2985-30DBVR  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
3000  
250  
178.0  
178.0  
180.0  
178.0  
178.0  
180.0  
178.0  
180.0  
178.0  
180.0  
180.0  
178.0  
180.0  
178.0  
180.0  
178.0  
180.0  
178.0  
9.0  
9.0  
9.2  
9.0  
9.0  
9.2  
9.0  
9.2  
9.0  
9.2  
9.2  
9.0  
9.2  
9.0  
9.2  
9.0  
9.2  
9.0  
3.23  
3.3  
3.17  
3.2  
1.37  
1.4  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
3000  
3000  
3000  
250  
3.17  
3.3  
3.23  
3.2  
1.37  
1.4  
3.3  
3.2  
1.4  
3.17  
3.23  
3.17  
3.3  
3.23  
3.17  
3.23  
3.2  
1.37  
1.37  
1.37  
1.4  
250  
3000  
3000  
250  
3.17  
3.17  
3.23  
3.17  
3.3  
3.23  
3.23  
3.17  
3.23  
3.2  
1.37  
1.37  
1.37  
1.37  
1.4  
3000  
3000  
250  
250  
3000  
3000  
3000  
3000  
3.17  
3.23  
3.17  
3.23  
3.23  
3.17  
3.23  
3.17  
1.37  
1.37  
1.37  
1.37  
Pack Materials-Page 1  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
29-May-2015  
Device  
Package Package Pins  
Type Drawing  
SPQ  
Reel  
Reel  
A0  
B0  
K0  
P1  
W
Pin1  
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant  
(mm) W1 (mm)  
LP2985-30DBVT  
LP2985-33DBVR  
LP2985-33DBVRG4  
LP2985-33DBVT  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
250  
3000  
3000  
250  
180.0  
178.0  
178.0  
178.0  
178.0  
180.0  
178.0  
180.0  
178.0  
178.0  
330.0  
178.0  
180.0  
178.0  
180.0  
180.0  
178.0  
180.0  
180.0  
178.0  
180.0  
180.0  
178.0  
178.0  
180.0  
180.0  
180.0  
178.0  
178.0  
178.0  
180.0  
178.0  
178.0  
180.0  
180.0  
9.2  
9.0  
9.0  
9.0  
9.0  
9.2  
9.0  
9.2  
9.0  
9.0  
8.4  
9.0  
9.2  
9.0  
9.2  
9.2  
9.0  
9.2  
9.2  
9.0  
9.2  
9.2  
9.0  
9.0  
9.2  
9.2  
9.2  
9.0  
9.0  
9.0  
9.2  
9.0  
9.0  
9.2  
9.2  
3.17  
3.3  
3.23  
3.2  
1.37  
1.4  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
4.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
Q3  
3.3  
3.2  
1.4  
3.23  
3.23  
3.17  
3.23  
3.17  
3.23  
3.3  
3.17  
3.17  
3.23  
3.17  
3.23  
3.17  
3.2  
1.37  
1.37  
1.37  
1.37  
1.37  
1.37  
1.4  
LP2985-33DBVTG4  
LP2985-50DBVR  
LP2985-50DBVR  
LP2985-50DBVT  
250  
3000  
3000  
250  
LP2985A-10DBVR  
LP2985A-10DBVT  
LP2985A-18DBVJ  
LP2985A-18DBVR  
LP2985A-18DBVR  
LP2985A-18DBVRG4  
LP2985A-18DBVT  
LP2985A-25DBVR  
LP2985A-25DBVR  
LP2985A-25DBVT  
LP2985A-28DBVR  
LP2985A-28DBVR  
LP2985A-28DBVT  
LP2985A-29DBVR  
LP2985A-29DBVR  
LP2985A-30DBVR  
LP2985A-30DBVR  
LP2985A-30DBVT  
LP2985A-33DBVR  
LP2985A-33DBVR  
LP2985A-33DBVRG4  
LP2985A-33DBVT  
LP2985A-33DBVT  
LP2985A-33DBVTG4  
LP2985A-50DBVR  
LP2985A-50DBVR  
LP2985A-50DBVT  
3000  
250  
10000  
3000  
3000  
3000  
250  
3.17  
3.23  
3.17  
3.23  
3.17  
3.17  
3.23  
3.17  
3.17  
3.23  
3.17  
3.17  
3.23  
3.23  
3.17  
3.17  
3.17  
3.3  
3.23  
3.17  
3.23  
3.17  
3.23  
3.23  
3.17  
3.23  
3.23  
3.17  
3.23  
3.23  
3.17  
3.17  
3.23  
3.23  
3.23  
3.2  
1.37  
1.37  
1.37  
1.37  
1.37  
1.37  
1.37  
1.37  
1.37  
1.37  
1.37  
1.37  
1.37  
1.37  
1.37  
1.37  
1.37  
1.4  
3000  
3000  
250  
3000  
3000  
250  
3000  
3000  
3000  
3000  
250  
3000  
3000  
3000  
250  
3.3  
3.2  
1.4  
3.23  
3.17  
3.23  
3.23  
3.17  
3.17  
3.17  
3.23  
3.17  
3.17  
3.23  
3.23  
1.37  
1.37  
1.37  
1.37  
1.37  
1.37  
250  
250  
3000  
3000  
250  
Pack Materials-Page 2  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
29-May-2015  
*All dimensions are nominal  
Device  
Package Type Package Drawing Pins  
SPQ  
Length (mm) Width (mm) Height (mm)  
LP2985-10DBVR  
LP2985-10DBVT  
LP2985-18DBVR  
LP2985-18DBVR  
LP2985-18DBVRG4  
LP2985-18DBVT  
LP2985-18DBVTG4  
LP2985-25DBVR  
LP2985-25DBVR  
LP2985-25DBVT  
LP2985-28DBVR  
LP2985-28DBVR  
LP2985-28DBVT  
LP2985-28DBVTG4  
LP2985-29DBVR  
LP2985-29DBVR  
LP2985-30DBVR  
LP2985-30DBVR  
LP2985-30DBVT  
LP2985-33DBVR  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
3000  
250  
180.0  
180.0  
205.0  
180.0  
180.0  
205.0  
180.0  
205.0  
180.0  
205.0  
205.0  
180.0  
205.0  
180.0  
205.0  
180.0  
205.0  
180.0  
205.0  
180.0  
180.0  
180.0  
200.0  
180.0  
180.0  
200.0  
180.0  
200.0  
180.0  
200.0  
200.0  
180.0  
200.0  
180.0  
200.0  
180.0  
200.0  
180.0  
200.0  
180.0  
18.0  
18.0  
33.0  
18.0  
18.0  
33.0  
18.0  
33.0  
18.0  
33.0  
33.0  
18.0  
33.0  
18.0  
33.0  
18.0  
33.0  
18.0  
33.0  
18.0  
3000  
3000  
3000  
250  
250  
3000  
3000  
250  
3000  
3000  
250  
250  
3000  
3000  
3000  
3000  
250  
3000  
Pack Materials-Page 3  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
29-May-2015  
Device  
Package Type Package Drawing Pins  
SPQ  
Length (mm) Width (mm) Height (mm)  
LP2985-33DBVRG4  
LP2985-33DBVT  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
DBV  
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
3000  
250  
180.0  
180.0  
180.0  
205.0  
180.0  
205.0  
180.0  
180.0  
358.0  
180.0  
205.0  
180.0  
205.0  
205.0  
180.0  
205.0  
205.0  
180.0  
205.0  
205.0  
180.0  
180.0  
205.0  
205.0  
205.0  
180.0  
180.0  
180.0  
205.0  
180.0  
180.0  
205.0  
205.0  
180.0  
180.0  
180.0  
200.0  
180.0  
200.0  
180.0  
180.0  
332.0  
180.0  
200.0  
180.0  
200.0  
200.0  
180.0  
200.0  
200.0  
180.0  
200.0  
200.0  
180.0  
180.0  
200.0  
200.0  
200.0  
180.0  
180.0  
180.0  
200.0  
180.0  
180.0  
200.0  
200.0  
18.0  
18.0  
18.0  
33.0  
18.0  
33.0  
18.0  
18.0  
35.0  
18.0  
33.0  
18.0  
33.0  
33.0  
18.0  
33.0  
33.0  
18.0  
33.0  
33.0  
18.0  
18.0  
33.0  
33.0  
33.0  
18.0  
18.0  
18.0  
33.0  
18.0  
18.0  
33.0  
33.0  
LP2985-33DBVTG4  
LP2985-50DBVR  
LP2985-50DBVR  
LP2985-50DBVT  
250  
3000  
3000  
250  
LP2985A-10DBVR  
LP2985A-10DBVT  
LP2985A-18DBVJ  
LP2985A-18DBVR  
LP2985A-18DBVR  
LP2985A-18DBVRG4  
LP2985A-18DBVT  
LP2985A-25DBVR  
LP2985A-25DBVR  
LP2985A-25DBVT  
LP2985A-28DBVR  
LP2985A-28DBVR  
LP2985A-28DBVT  
LP2985A-29DBVR  
LP2985A-29DBVR  
LP2985A-30DBVR  
LP2985A-30DBVR  
LP2985A-30DBVT  
LP2985A-33DBVR  
LP2985A-33DBVR  
LP2985A-33DBVRG4  
LP2985A-33DBVT  
LP2985A-33DBVT  
LP2985A-33DBVTG4  
LP2985A-50DBVR  
LP2985A-50DBVR  
LP2985A-50DBVT  
3000  
250  
10000  
3000  
3000  
3000  
250  
3000  
3000  
250  
3000  
3000  
250  
3000  
3000  
3000  
3000  
250  
3000  
3000  
3000  
250  
250  
250  
3000  
3000  
250  
Pack Materials-Page 4  
IMPORTANT NOTICE  
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other  
changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest  
issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and  
complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale  
supplied at the time of order acknowledgment.  
TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms  
and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary  
to support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarily  
performed.  
TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and  
applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide  
adequate design and operating safeguards.  
TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or  
other intellectual property right relating to any combination, machine, or process in which TI components or services are used. Information  
published by TI regarding third-party products or services does not constitute a license to use such products or services or a warranty or  
endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the  
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Reproduction of significant portions of TI information in TI data books or data sheets is permissible only if reproduction is without alteration  
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TI is not responsible or liable for any such statements.  
Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements  
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In some cases, TI components may be promoted specifically to facilitate safety-related applications. With such components, TI’s goal is to  
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requirements. Nonetheless, such components are subject to these terms.  
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Only those TI components which TI has specifically designated as military grade or “enhanced plastic” are designed and intended for use in  
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TI has specifically designated certain components as meeting ISO/TS16949 requirements, mainly for automotive use. In any case of use of  
non-designated products, TI will not be responsible for any failure to meet ISO/TS16949.  
Products  
Applications  
Audio  
www.ti.com/audio  
amplifier.ti.com  
dataconverter.ti.com  
www.dlp.com  
Automotive and Transportation www.ti.com/automotive  
Communications and Telecom www.ti.com/communications  
Amplifiers  
Data Converters  
DLP® Products  
DSP  
Computers and Peripherals  
Consumer Electronics  
Energy and Lighting  
Industrial  
www.ti.com/computers  
www.ti.com/consumer-apps  
www.ti.com/energy  
dsp.ti.com  
Clocks and Timers  
Interface  
www.ti.com/clocks  
interface.ti.com  
logic.ti.com  
www.ti.com/industrial  
www.ti.com/medical  
Medical  
Logic  
Security  
www.ti.com/security  
Power Mgmt  
Microcontrollers  
RFID  
power.ti.com  
Space, Avionics and Defense  
Video and Imaging  
www.ti.com/space-avionics-defense  
www.ti.com/video  
microcontroller.ti.com  
www.ti-rfid.com  
www.ti.com/omap  
OMAP Applications Processors  
Wireless Connectivity  
TI E2E Community  
e2e.ti.com  
www.ti.com/wirelessconnectivity  
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265  
Copyright © 2015, Texas Instruments Incorporated  

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