ld3985j285r STMicroelectronics, ld3985j285r Datasheet

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ld3985j285r

Manufacturer Part Number
ld3985j285r
Description
Ultra Low Drop-low Noise Bicmos Voltage Regulators Low Esr Capacitors Compatible
Manufacturer
STMicroelectronics
Datasheet
DESCRIPTION
The LD3985 provides up to 150mA, from 2.5V to
6V input voltage.
Figure 1: Schematic Diagram
October 2004
INPUT VOLTAGE FROM 2.5V TO 6V
STABLE WITH LOW ESR CERAMIC
CAPACITORS
ULTRA LOW DROPOUT VOLTAGE (100mV
TYP. AT 150mA LOAD, 0.4mV TYP. AT 1mA
LOAD)
VERY LOW QUIESCENT CURRENT (85µA
TYP. AT NO LOAD, 170µA TYP. AT 150mA
LOAD; MAX 1.5µA IN OFF MODE)
GUARANTEED OUTPUT CURRENT UP TO
150mA
WIDE RANGE OF OUTPUT VOLTAGE: 1.2V;
1.22V; 1.25V; 1.35V; 1.5V; 1.8V; 2V; 2.1V;
2.2V; 2.4V; 2.5V; 2.6V; 2.7V; 2.8V; 2.85V;
2.9V; 3V; 3.1V; 3.2V; 3.3V; 4.7V; 5V
FAST TURN-ON TIME: TYP. 200µs [C
C
LOGIC-CONTROLLED ELECTRONIC
SHUTDOWN
INTERNAL CURRENT AND THERMAL LIMIT
OUTPUT LOW NOISE VOLTAGE 30µVRMS
OVER 10Hz to 100KHz
S.V.R. OF 60dB AT 1KHz, 50dB AT 10KHz
TEMPERATURE RANGE: -40°C TO 125°C
BYP
= 10nF AND I
REGULATORS LOW ESR CAPACITORS COMPATIBLE
ULTRA LOW DROP-LOW NOISE BICMOS VOLTAGE
O
=1mA]
O
=1µF,
The ultra low drop-voltage, low quiescent current
and low noise make it suitable for low power
applications and in battery powered systems.
Regulator ground current increases only slightly in
dropout, further prolonging the battery life. Power
supply rejection is better than 60 dB at low
frequencies and starts to roll off at 10KHz. High
power supply rejection is maintained down to low
input voltage levels common to battery operated
circuits. Shutdown Logic Control function is
available, this means that when the device is used
as local regulator, it is possible to put a part of the
board in standby, decreasing the total power
consumption. The LD3985 is designed to work
with
applications are in mobile phone and similar
battery powered wireless systems.
(1.57x1.22)
Flip-Chip
low
ESR
ceramic
SOT23-5L
capacitors. Typical
Rev. 8
SERIES
LD3985
TSOT23-5L
1/14

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ld3985j285r Summary of contents

Page 1

ULTRA LOW DROP-LOW NOISE BICMOS VOLTAGE REGULATORS LOW ESR CAPACITORS COMPATIBLE INPUT VOLTAGE FROM 2. STABLE WITH LOW ESR CERAMIC CAPACITORS ULTRA LOW DROPOUT VOLTAGE (100mV TYP. AT 150mA LOAD, 0.4mV TYP. AT 1mA LOAD) VERY LOW QUIESCENT ...

Page 2

... LD3985G15R (*) LD3985J15R (*) LD3985G18R LD3985J18R LD3985G20R (*) LD3985J20R (*) LD3985G21R (*) LD3985J21R (*) LD3985G22R (*) LD3985J22R (*) LD3985G24R (*) LD3985J24R LD3985G25R LD3985J25R LD3985G26R (*) LD3985J26R LD3985G27R LD3985J27R LD3985G28R (*) LD3985J28R LD3985J285R (*) LD3985G29R LD3985J29R LD3985G30R (*) LD3985J30R LD3985G31R (*) LD3985J31R LD3985G32R (*) LD3985J32R (*) LD3985G33R (*) LD3985J33R LD3985G44R (*) LD3985J44R (*) LD3985G47R (*) LD3985J47R LD3985G48R (*) LD3985J48R LD3985G49R (*) LD3985J49R (*) LD3985G50R (*) ...

Page 3

Figure 2: Connection Diagram (top view for SOT and TSOT, top through view for Flip-Chip) TSOT23-5L/SOT23-5L Table 4: Pin Description Pin N° Pin N° SOT23-5L/ Symbol Flip-Chip TSOT23- GND INH 4 ...

Page 4

LD3985 SERIES Table 5: Electrical Characteristics For LD3985 ( 10nF 1mA 1.4V, unless otherwise specified) BYP O INH Symbol Parameter V Operating Input Voltage I V Output Voltage < 2. Output Voltage ...

Page 5

Symbol Parameter C Output Capacitor O Note 1 – For V < 2V 2.5V O(NOM) I Note 2 – For V = 1.25V 2.5V O(NOM) I Note 3 – Dropout voltage is the input-to-output voltage difference ...

Page 6

LD3985 SERIES Figure 8: Shutdown Voltage vs Temperature Figure 9: Line Regulation vs Temperature Figure 10: Line Regulation vs Temperature 6/14 Figure 11: Line Regulation vs Temperature Figure 12: Load Regulation vs Temperature Figure 13: Load Regulation vs Temperature ...

Page 7

Figure 14: Load Regulation vs Temperature Figure 15: Quiescent Current vs Temperature Figure 16: Quiescent Current vs Temperature LD3985 SERIES Figure 17: Quiescent Current vs Temperature Figure 18: Supply Voltage Rejection vs Frequency Figure 19: Load Transient Response V = ...

Page 8

LD3985 SERIES Figure 20: Line Transient Response V = 3.8V to 4.4V 25° 150mA 10nF, Rise-Fall time = 1 sec 2.7V BYP O Figure 21: START- ...

Page 9

SOT23-5L MECHANICAL DATA mm. DIM. MIN. TYP A 0.90 A1 0.00 A2 0.90 b 0.35 C 0.09 D 2.80 E 1.50 e 0.95 H 2.60 L 0.10 MAX. MIN. 1.45 35.4 0.10 0.0 1.30 35.4 0.50 13.7 0.20 3.5 3.00 ...

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LD3985 SERIES TSOT23-5L MECHANICAL DATA DIM. MIN 0.7 b 0 0.3 10/14 mm. TYP MAX. MIN. 1.1 0.1 1.0 27.6 0.5 11.8 0.2 3.1 2.9 2.8 1.6 0.95 ...

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Flip-Chip5 MECHANICAL DATA mm. DIM. MIN. TYP A 0.835 0.9 A1 0.21 0.25 A2 0.625 0.65 b 0.265 0.315 D 1.510 1.540 E 1.16 1.19 e 0.45 0.5 e1 0.816 0.866 f 0.345 f1 0.337 mils MAX. MIN. TYP. 0.965 ...

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LD3985 SERIES Tape & Reel SOT23-xL MECHANICAL DATA DIM. MIN 12 3.13 Bo 3.07 Ko 1.27 Po 3.9 P 3.9 12/14 mm. TYP MAX. MIN. 180 13.0 13.2 0.504 0.795 2.362 14.4 ...

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Table 6: Revision History Date Revision 07-May-2004 6 05-Oct-2004 7 27-Oct-2004 8 Description of Changes Part Number Status Changed on Table 3. t values are Changed on Table 5. ON Order Codes changed - Table 3. LD3985 SERIES 13/14 ...

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... No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics ...

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