Datasheet

ManualsBrandsLINEAR TECHNOLOGY ManualsPMICsPMIC - LDO voltage regulator Positive, fixed DDPAK 5

LT1963 Series

1963fc

TYPICAL APPLICATION

APPLICATIO S

FEATURES

DESCRIPTIO

1.5A, Low Noise,

Fast Transient Response

LDO Regulators

■

Optimized for Fast Transient Response

■

Output Current: 1.5A

■

Dropout Voltage: 340mV

■

Low Noise: 40

RMS

(10Hz to 100kHz)

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1mA Quiescent Current

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No Protection Diodes Needed

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Controlled Quiescent Current in Dropout

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Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3.3V

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Adjustable Output from 1.21V to 20V

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<1µA Quiescent Current in Shutdown

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Stable with 10µF Output Capacitor

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Reverse Battery Protection

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No Reverse Current

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Thermal Limiting

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5-Lead TO-220, DD, 3-Lead SOT-223, 8-Lead SO

and 16-Lead TSSOP Packages

The LT

1963 series are low dropout regulators optimized

for fast transient response. The devices are capable of

supplying 1.5A of output current with a dropout voltage of

340mV. Operating quiescent current is 1mA, dropping to

<1µA in shutdown. Quiescent current is well controlled; it

does not rise in dropout as it does with many other

regulators. In addition to fast transient response, the

LT1963 regulators have very low output noise which

makes them ideal for sensitive RF supply applications.

Output voltage range is from 1.21V to 20V. The LT1963

regulators are stable with output capacitors as low as

10µF. Internal protection circuitry includes reverse battery

protection, current limiting, thermal limiting and reverse

current protection. The devices are available in fixed

output voltages of 1.5V, 1.8V, 2.5V, 3.3V and as an

adjustable device with a 1.21V reference voltage. The

LT1963 regulators are available in 5-lead TO-220, DD,

3-lead SOT-223, 8-lead SO, and Exposed Pad 16-lead

TSSOP packages.

3.3V to 2.5V Regulator

■

3.3V to 2.5V Logic Power Supplies

■

Post Regulator for Switching Supplies

SHDN

10µF

1963 TA01

OUT

> 3V

SENSE

GND

LT1963-2.5

2.5V

1.5A

10µF

OUTPUT CURRENT (A)

DROPOUT VOLTAGE (mV)

200

300

1.6

1963 TA02

100

0.4

0.8

1.2

0.2

0.6

1.0

1.4

400

150

250

350

Dropout Voltage

, LTC and LT are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners. Protected by U.S. Patents,

including 6118263, 6144250.

Summary of content (20 pages)

PAGE 1
LT1963 Series 1.5A, Low Noise, Fast Transient Response LDO Regulators U FEATURES DESCRIPTIO ■ The LT ®1963 series are low dropout regulators optimized for fast transient response. The devices are capable of supplying 1.5A of output current with a dropout voltage of 340mV. Operating quiescent current is 1mA, dropping to < 1µA in shutdown. Quiescent current is well controlled; it does not rise in dropout as it does with many other regulators.
PAGE 2
LT1963 Series U W W W ABSOLUTE AXI U RATI GS (Note 1) IN Pin Voltage ........................................................ ±20V OUT Pin Voltage .................................................... ±20V Input to Output Differential Voltage (Note 2) ......... ±20V SENSE Pin Voltage ............................................... ±20V ADJ Pin Voltage ...................................................... ±7V SHDN Pin Voltage .................................................
PAGE 3
LT1963 Series ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. (Note 3) PARAMETER CONDITIONS Minimum Input Voltage (Notes 4,12) ILOAD = 0.5A ILOAD = 1.5A Regulated Output Voltage (Note 5) LT1963-1.5 LT1963-1.8 LT1963-2.5 LT1963-3.3 MIN 1.477 1.447 1.500 1.500 1.523 1.545 V V VIN = 2.3V, ILOAD = 1mA 2.8V < VIN < 20V, 1mA < ILOAD < 1.5A ● 1.773 1.737 1.800 1.800 1.827 1.
PAGE 4
LT1963 Series ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. (Note 3) PARAMETER CONDITIONS Current Limit VIN = 7V, VOUT = 0V VIN = VOUT(NOMINAL) + 1V, ∆VOUT = – 0.1V Input Reverse Leakage Current (Note 13) Reverse Output Current (Note 11) MIN Q, T, S8 Packages VIN = – 20V, VOUT = 0V ST Package VIN = – 20V, VOUT = 0V LT1963-1.5 VOUT = 1.5V, VIN < 1.5V LT1963-1.8 VOUT = 1.8V, VIN < 1.8V LT1963-2.
PAGE 5
LT1963 Series U W TYPICAL PERFOR A CE CHARACTERISTICS Typical Dropout Voltage Guaranteed Dropout Voltage GUARANTEED DROPOUT VOLTAGE (mV) 600 450 350 TJ = 125°C 300 250 TJ = 25°C 200 150 100 50 0 0 0.2 0.4 0.6 0.8 1.0 1.2 OUTPUT CURRENT (A) 1.4 450 500 TJ ≤ 125°C 400 TJ ≤ 25°C 300 200 1.6 OUTPUT VOLTAGE (V) LT1963 0.6 0.4 VIN = 6V RL = ∞, IL = 0 VSHDN = VIN 0.2 0.4 0.6 0.8 1.0 1.2 OUTPUT CURRENT (A) 1.4 50 25 75 0 TEMPERATURE (°C) 100 1.6 150 1.52 1.82 1.51 1.50 1.49 1.
PAGE 6
LT1963 Series U W TYPICAL PERFOR A CE CHARACTERISTICS LT1963-1.8 Quiescent Current 14 14 10 8 6 4 10 8 6 4 0 1 2 3 4 5 6 7 INPUT VOLTAGE (V) 8 9 1 2 3 4 5 6 7 INPUT VOLTAGE (V) 8 LT1963-3.3 Quiescent Current 6 4 0.8 0.6 0.
PAGE 7
LT1963 Series U W TYPICAL PERFOR A CE CHARACTERISTICS LT1963 GND Pin Current 100 TJ = 25°C VSHDN = VIN *FOR VOUT = 1.21V GND PIN CURRENT (mA) GND PIN CURRENT (mA) 80 RL = 4.33, IL = 300mA* 6 4 RL = 12.1, IL = 100mA* 2 70 60 50 RL = 1.5, IL = 1A* 40 0 0 1 2 3 4 5 6 7 INPUT VOLTAGE (V) 8 30 0 1 2 100 3 4 5 6 7 INPUT VOLTAGE (V) 8 RL = 2.5, IL = 1A* RL = 5, IL = 500mA* 80 70 RL = 2.2, IL = 1.5A* 60 50 40 RL = 3.3, IL = 1A* 30 2 3 4 5 6 7 INPUT VOLTAGE (V) 8 9 0 10 80 0.
PAGE 8
LT1963 Series U W TYPICAL PERFOR A CE CHARACTERISTICS SHDN Pin Input Current SHDN Pin Input Current SHDN PIN INPUT CURRENT (µA) 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 2 4 5 4 3 2 6 8 10 12 14 16 18 20 SHDN PIN VOLTAGE (V) Current Limit 50 25 75 0 TEMPERATURE (°C) 100 1.5 1.0 2.5 2.0 1.5 1.0 0.5 0.5 ∆VOUT = 100mV 6 8 10 12 14 16 18 20 4 INPUT/OUTPUT DIFFERENTIAL (V) Reverse Output Current RIPPLE REJECTION (dB) LT1963 –25 50 25 0 75 TEMPERATURE (°C) 100 0.1 100 125 1963 G30 LT1963 2.5 2.
PAGE 9
LT1963 Series U W TYPICAL PERFOR A CE CHARACTERISTICS LT1963 Minimum Input Voltage LOAD REGULATION (mV) IL = 500mA 2.0 IL = 100mA 1.0 0.5 0 50 25 75 0 TEMPERATURE (°C) 100 125 LT1963 –5 LT1963-2.5 LT1963-3.3 –10 –15 VIN = VOUT(NOMINAL) +1V (LT1963-1.5/-1.8/-2.5/-3.3) VIN = 2.7V (LT1963) ∆IL = 1mA TO 1.5A – 20 –50 –25 50 25 75 0 TEMPERATURE (°C) 1963 G33 50 100 125 1.0 COUT = 10µF IL =1.5A LT1963-2.5 LT1963-3.3 0.1 LT1963-1.8 0.01 10 100 LT1963 LT1963-1.
PAGE 10
LT1963 Series U U U PI FU CTIO S OUT: Output. The output supplies power to the load. A minimum output capacitor of 10µF is required to prevent oscillations. Larger output capacitors will be required for applications with large transient loads to limit peak voltage transients. See the Applications Information section for more information on output capacitance and reverse output characteristics. SENSE: Sense. For fixed voltage versions of the LT1963 (LT1963-1.5/LT1963-1.8/LT1963-2.5/LT1963-3.
PAGE 11
LT1963 Series U W U U APPLICATIO S I FOR ATIO The LT1963 series are 1.5A low dropout regulators optimized for fast transient response. The devices are capable of supplying 1.5A at a dropout voltage of 350mV. The low operating quiescent current (1mA) drops to less than 1µA in shutdown. In addition to the low quiescent current, the LT1963 regulators incorporate several protection features which make them ideal for use in battery-powered systems.
PAGE 12
LT1963 Series U W U U APPLICATIO S I FOR ATIO 20 operating region for all values of input-to-output voltage. The protection is designed to provide some output current at all values of input-to-output voltage up to the device breakdown. BOTH CAPACITORS ARE 16V, 1210 CASE SIZE, 10µF 0 CHANGE IN VALUE (%) X5R –20 –40 –60 Y5V –80 –100 0 2 4 8 6 10 12 DC BIAS VOLTAGE (V) 14 16 1963 F03 Figure 3.
PAGE 13
LT1963 Series U W U U APPLICATIO S I FOR ATIO Table 2. SO-8 Package, 8-Lead SO Thermal Considerations The power handling capability of the device is limited by the maximum rated junction temperature (125°C). The power dissipated by the device is made up of two components: 1. Output current multiplied by the input/output voltage differential: (IOUT)(VIN – VOUT), and 2. GND pin current multiplied by the input voltage: (IGND)(VIN).
PAGE 14
LT1963 Series U W U U APPLICATIO S I FOR ATIO 1.41W(28°C/W) = 39.5°C The maximum junction temperature will then be equal to the maximum junction temperature rise above ambient plus the maximum ambient temperature or: TJMAX = 50°C + 39.5°C = 89.5°C Protection Features The LT1963 regulators incorporate several protection features which make them ideal for use in battery-powered circuits.
PAGE 15
LT1963 Series U TYPICAL APPLICATIO S SCR Pre-Regulator Provides Efficiency Over Line Variations L1 500µH L2 LT1963-3.3 IN OUT 1N4148 10VAC AT 115VIN + SHDN GND 10000µF 1k 90-140 VAC 3.3VOUT 1.5A + FB 22µF 34k* 10VAC AT 115VIN 1N4002 1N4002 12.1k* +V “SYNC” 1N4002 TO ALL “+V” POINTS + 22µF 2.4k C1A + 750Ω 200k 1N4148 1/2 LT1018 – 0.1µF +V C1B 750Ω +V + 1/2 LT1018 A1 1N4148 + 0.
PAGE 16
LT1963 Series U PACKAGE DESCRIPTIO Q Package 5-Lead Plastic DD Pak (Reference LTC DWG # 05-08-1461) .256 (6.502) .060 (1.524) TYP .060 (1.524) .390 – .415 (9.906 – 10.541) .165 – .180 (4.191 – 4.572) .045 – .055 (1.143 – 1.397) 15° TYP .060 (1.524) .183 (4.648) +.008 .004 –.004 +0.203 0.102 –0.102 .059 (1.499) TYP .330 – .370 (8.382 – 9.398) ( ) .095 – .115 (2.413 – 2.921) .075 (1.905) .300 (7.620) +.012 .143 –.020 +0.305 3.632 –0.
PAGE 17
LT1963 Series U PACKAGE DESCRIPTIO S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .189 – .197 (4.801 – 5.004) NOTE 3 .045 ±.005 .050 BSC 8 .245 MIN 7 6 5 .160 ±.005 .150 – .157 (3.810 – 3.988) NOTE 3 .228 – .244 (5.791 – 6.197) .030 ±.005 TYP 1 RECOMMENDED SOLDER PAD LAYOUT .010 – .020 × 45° (0.254 – 0.508) .008 – .010 (0.203 – 0.254) 0°– 8° TYP .016 – .050 (0.406 – 1.270) NOTE: 1. DIMENSIONS IN .053 – .069 (1.346 – 1.752) .014 – .019 (0.
PAGE 18
LT1963 Series U PACKAGE DESCRIPTIO ST Package 3-Lead Plastic SOT-223 (Reference LTC DWG # 05-08-1630) .248 – .264 (6.30 – 6.71) .129 MAX .114 – .124 (2.90 – 3.15) .059 MAX .264 – .287 (6.70 – 7.30) .248 BSC .130 – .146 (3.30 – 3.71) .039 MAX .059 MAX .090 BSC .181 MAX .033 – .041 (0.84 – 1.04) .0905 (2.30) BSC RECOMMENDED SOLDER PAD LAYOUT 10° – 16° .010 – .014 (0.25 – 0.36) 10° MAX .071 (1.80) MAX 10° – 16° .024 – .033 (0.60 – 0.84) .0008 – .0040 (0.0203 – 0.1016) .012 (0.31) MIN .
PAGE 19
LT1963 Series U PACKAGE DESCRIPTIO FE Package 16-Lead Plastic TSSOP (4.4mm) (Reference LTC DWG # 05-08-1663) Exposed Pad Variation BB 4.90 – 5.10* (.193 – .201) 3.58 (.141) 3.58 (.141) 16 1514 13 12 1110 6.60 ±0.10 9 2.94 (.116) 4.50 ±0.10 2.94 6.40 (.116) (.252) BSC SEE NOTE 4 0.45 ±0.05 1.05 ±0.10 0.65 BSC 1 2 3 4 5 6 7 8 RECOMMENDED SOLDER PAD LAYOUT 4.30 – 4.50* (.169 – .177) 0.09 – 0.20 (.0035 – .0079) 0.50 – 0.75 (.020 – .030) NOTE: 1.
PAGE 20
LT1963 Series U TYPICAL APPLICATIO S Adjustable Current Source R5 0.01Ω VIN > 2.7V + C1 10µF R1 1k LT1004-1.2 R2 80.6k LT1963-1.8 IN OUT SHDN GND R4 2.2k R6 2.2k FB R8 100k C3 1µF R3 2k 2 3 C2 3.3µF NOTE: ADJUST R1 FOR 0A TO 1.5A CONSTANT CURRENT LOAD + 1 1/2 LT1366 – R7 470Ω 8 4 1963 TA04 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1129 700mA, Micropower, LDO VIN: 4.2V to 30V, VOUT(MIN) = 3.75V, VDO = 0.