TPS7A4901
Positive Linear RegulatorThe TPS7A4901 is a positive linear regulator from Texas Instruments. View the full TPS7A4901 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
Official TPS7A4901 datasheet (PDF) — the source this page was extracted from.
Manufacturer
Texas InstrumentsCategory
Linear Regulators (LDO)TPS7A4901 Key Specifications
| Parameter | Value |
|---|---|
| Psrr | 72dB (120Hz) |
| Noise | 15.4 μVRMS (10Hz to 100kHz) |
| Output Current | 150mA |
| Dropout Voltage | 260mV at 100mA |
| Input Voltage Range | 3V to 36V |
| Output Voltage Range | 1.194V to 33V |
| Operating Temperature Range | -40°C to 125°C |
TPS7A4901 Overview
Part: TPS7A49 — Texas Instruments
Type: Ultralow-Noise Positive Linear Regulator
Description: 36 V, 150 mA ultralow-noise positive linear regulator featuring 15.4 μVRMS output noise, 72 dB PSRR, and an adjustable output down to 1.194 V.
Operating Conditions:
- Supply voltage: 3 to 35 V
- Operating temperature: -40 to 125 °C (junction temperature, TJ)
- Output voltage range: VFB to 33 V
- Output current: 0 to 150 mA
Absolute Maximum Ratings:
- Max junction/storage temperature: 150 °C (Storage, Tstg); 125 °C (Operating virtual junction, TJ)
Key Specs:
- Output voltage noise: 12.7 μVRMS (20 Hz to 20 kHz)
- Output voltage noise: 15.4 μVRMS (10 Hz to 100 kHz)
- Power-supply ripple rejection (PSRR): 72 dB (at 120 Hz)
- Power-supply ripple rejection (PSRR): ≥ 52 dB (10 Hz to 400 kHz)
- Dropout voltage: 260 mV (at IOUT = 100 mA)
- Adjustable output range: 1.194 V to 33 V
- Minimum output capacitance for stability: ≥ 2.2 μF
Features:
- Capacitor-programmable soft-start function
- CMOS logic-level-compatible enable pin
- Fixed current-limit protection
- Thermal shutdown protection
Applications:
- Supply rails for op amps, DACs, ADCs, and other high-precision analog circuitry
- Audio
- Post DC-DC converter regulation and ripple filtering
- Test and measurement
- Rx, Tx, and PA circuitry
- Industrial instrumentation
- Base stations and telecom infrastructure
Package:
- 8-pin HVSSOP PowerPAD (3.00 mm × 3.00 mm)
- 8-pin VSON (3.00 mm × 3.00 mm)
TPS7A4901 Features
TPS7A49
SBVS121E -AUGUST 2010-REVISED MAY 2015
TPS7A4901 Applications
- Supply Rails for Op Amps, DACs, ADCs, and Other High-Precision Analog Circuitry
- Audio
- Post DC-DC Converter Regulation and Ripple Filtering
- Test and Measurement
- Rx, Tx, and PA Circuitry
- Industrial Instrumentation
- Base Stations and Telecom Infrastructure
The TPS7A49 series of devices are positive, highvoltage (36 V), ultralow-noise (15.4 μ VRMS, 72-dB PSRR) linear regulators that can source a 150-mA load.
These linear regulators include a CMOS logic-levelcompatible enable pin and capacitor-programmable soft-start function that allows for customized powermanagement schemes. Other available features include built-in current limit and thermal shutdown protection to safeguard the device and system during fault conditions.
The TPS7A49 family is designed using bipolar technology, and is ideal for high-accuracy, highprecision instrumentation applications where clean voltage rails are critical to maximize system performance. This design makes the device an excellent choice to power operational amplifiers, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and other high-performance analog circuitry.
In addition, the TPS7A49 family of linear regulators is suitable for post dc-dc converter regulation. By filtering out the output voltage ripple inherent to dc-dc switching conversion, maximum system performance is provided in sensitive instrumentation, test and measurement, audio, and RF applications.
For applications where positive and negative highperformance rails are required, consider TI's TPS7A30xx family of negative high-voltage, ultralownoise linear regulators as well.
TPS7A4901 Pin Configuration
DGN Package 8-Pin HVSSOP PowerPAD Top View DRB Package VSON-8 Top View
| PIN - NAME | PIN - NO. | I/O | DESCRIPTION |
|---|---|---|---|
| DNC | 7 | - | Do not connect. Do not route this pin to any electrical net, not even GND or IN. |
| EN | 5 | I | This pin turns the regulator on or off. If V EN ≥ V EN(high) , the regulator is enabled. If V EN ≤ V EN(low) , the regulator is disabled. The EN pin can be connected to IN, if not used. V EN ≤ V IN . |
| FB | 2 | I | This pin is the input to the error amplifier. FB is used to set the output voltage of the device. |
| GND | 4 | - | Ground |
| IN | 8 | I | Input supply |
| NC | 3 | - | Not internally connected. This pin can either be left open or tied to GND. |
| NR/SS | 6 | - | Noise-reduction pin. Connecting an external capacitor to this pin bypasses noise generated by the internal band gap. This capacitor allows RMS noise to be reduced to very low levels and also controls the soft-start function. |
| OUT | 1 | O | Regulator output. A capacitor ≥ 2.2 μ F must be tied from this pin to ground to ensure stability. |
| PowerPAD | PowerPAD | - | Must either be left open or tied to ground. Solder to the printed-circuit-board (PCB) plane to enhance thermal performance. |
TPS7A4901 Electrical Characteristics
At TJ = -40°C to 125°C, VIN = VOUT(nom) + 1 V or VIN = 3 V (whichever is greater), VEN = VIN, IOUT = 1 mA, CIN = 2.2 μ F, COUT = 2.2 μ F, CNR/SS = 0 nF, and the FB pin tied to OUT, unless otherwise noted. Typical values are at TA = 25°C.
| PARAMETER | PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|---|
| V IN Input voltage range | V IN Input voltage range | 3 | 35 | V | ||
| V REF | Internal reference (1) | T J = 25°C, V NR/SS = V REF | 1.176 | 1.188 | 1.212 | V |
| V FB | Feedback voltage | 1.185 | V | |||
| V OUT | Output voltage range (2) | V IN ≥ V OUT(nom) + 1 V | V REF | 33 | V | |
| V OUT | Nominal accuracy | T J = 25°C, V IN = V OUT(nom) + 0.5 V | -1.5 | 1.5 | %V OUT | |
| V OUT | Overall accuracy | V OUT(nom) + 1 V ≤ V IN ≤ 35 V, 1 mA ≤ I OUT ≤ 150 mA | -2.5 | 2.5 | %V OUT | |
| /c68 /c68 V ( V ) OUT IN V OUT(NOM) | Line regulation | T J = 25°C, V OUT(nom) + 1 V ≤ V IN ≤ 35 V | 0.086 | %V OUT | ||
| /c68 /c68 V ( I ) OUT OUT V OUT(NOM) | Load regulation | T J = 25°C, 1 mA ≤ I OUT ≤ 150 mA | 0.04 | %V OUT | ||
| V DO | Dropout voltage | V IN = 95% V OUT(nom) , I OUT = 100 mA V IN = 95% V OUT(nom) , I OUT = 150 mA | 260 333 | 600 | mV mV | |
| I LIM | Current limit | V OUT = 90% V OUT(nom) | 220 | 309 | 500 | mA |
| I GND | Ground current | I OUT = 0 mA | 49 | 100 | μ A | |
| I GND | Ground current | I OUT = 100 mA | 800 | μ A | ||
| I SHDN | Shutdown supply current | V EN = 0.4 V | 0.8 | 3 | μ A | |
| I FB | Feedback current (3) | 3 | 100 | nA | ||
| I EN | Enable current | V EN = V IN = V OUT(nom) + 1 V | 0.02 | 1 | μ A | |
| I EN | Enable current | V EN = V IN = 35 V | 0.2 | 1 | μ A | |
| V EN(high) | Enable high-level voltage | 2.1 | V IN | V | ||
| V EN(low) | Enable low-level voltage | 0 | 0.4 | V | ||
| V n | V IN = 3 V, V OUT(nom) = V REF , C OUT = 10 μ F, C NR/SS = 10 nF, BW = 10 Hz to 100 kHz | 15.4 | μ V RMS | |||
| Output noise voltage | V IN = 6.2 V, V OUT(nom) = 5 V, C OUT = 10 μ F, C NR/SS = C FF (4) = 10 nF, BW = 10 Hz to 100 kHz μ F, | 21.15 | μ V RMS | |||
| PSRR | Power-supply rejection ratio | V IN = 6.2 V, V OUT(nom) = 5 V, C OUT = 10 C NR/SS = C FF (4) = 10 nF, f = 120 Hz | 72 | dB | ||
| T sd | Thermal shutdown temperature | Shutdown, temperature increasing Reset, temperature decreasing | 170 150 | °C °C | ||
| T J | Operating junction temperature | -40 | 125 | °C |
TPS7A4901 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| Voltage | IN pin to GND pin | -0.3 | 36 | V |
| Voltage | OUT pin to GND pin | -0.3 | 33 | V |
| Voltage | OUT pin to IN pin | -36 | 0.3 | V |
| Voltage | FB pin to GND pin | -0.3 | 2 | V |
| Voltage | FB pin to IN pin | -36 | 0.3 | V |
| Voltage | EN pin to IN pin | -36 | 0.3 | V |
| Voltage | EN pin to GND pin | -0.3 | 36 | V |
| Voltage | NR/SS pin to IN pin | -36 | 0.3 | V |
| Voltage | NR/SS pin to GND pin | -0.3 | 2 | V |
| Current | Peak output | Internally limited | Internally limited | |
| Temperature | Operating virtual junction, T J | -40 | 125 | °C |
| Temperature | Storage, T stg | -65 | 150 | °C |
TPS7A4901 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
| MIN | NOM | MAX | UNIT | ||
|---|---|---|---|---|---|
| V IN | Input supply voltage | 3 | 35 | V | |
| V EN | Enable supply voltage | 0 | V IN | V | |
| V OUT | Output voltage | V FB | 33 | V | |
| I OUT | Output current | 0 | 150 | mA | |
| T J | Operating junction temperature | -40 | 125 | °C | |
| C IN | Input capacitor | 2.2 | 10 | μF | |
| C OUT | Output capacitor | 2.2 | 10 | μF | |
| C NR | Noise reduction capacitor | 0 | 10 | nF | |
| C FF | Feed-forward capacitor | 0 | 10 | nF | |
| R 2 | Lower feedback resistor | 237 | 237 | 237 | k Ω |
TPS7A4901 Thermal Information
| THERMAL METRIC | (1) | TPS7A49 - DGN (HVSSOP PowerPAD) - 8 PINS | TPS7A49 - DRB (VSON) - 8 PINS | UNIT |
|---|---|---|---|---|
| R θ JA | Junction-to-ambient thermal resistance | 63.4 | 47.7 | °C/W |
| R θ JC(top) | Junction-to-case(top) thermal resistance | 53 | 55.3 | °C/W |
| R θ JB | Junction-to-board thermal resistance | 37.4 | 23.3 | °C/W |
| ψ JT | Junction-to-top characterization parameter | 3.7 | 1.1 | °C/W |
| ψ JB | Junction-to-board characterization parameter | 37.1 | 23.5 | °C/W |
| R θ JC(bot) | Junction-to-case(bottom) thermal resistance | 13.5 | 7.0 | °C/W |
TPS7A4901 Typical Application
The TPS7A49 devices belongs to a family of linear regulators that use an innovative bipolar process to achieve ultralow-noise and very high PSRR levels at a wide input voltage range. These features, combined with a high thermal-performance HVSSOP-8 with a PowerPAD package make this device ideal for high-performance analog applications.
TPS7A4901 Package Information
SMALL OUTLINE PACKAGE
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All Linear Regulators (LDO) datasheetsAll Texas Instruments datasheets (2,434)
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