TPS77515-EP - 500mA Fast Transient LDO | Texas Instruments
MPN: TPS77515-EP β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.1 | $31.00 |
| 100 | $2.75 | $275.00 |
| 500 | $2.4 | $1,200.00 |
| 1,000 | $2.05 | $2,050.00 |
Drop-in alternatives for TPS77515-EP β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TPS77515
β Drop-Inπ Reference alternative (not in catalog)
TPS77516
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TPS77518
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TPS77525
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TPS77533
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
TPS77515-EP Maximum Ratings & Electrical Characteristics
| Output Type | Fixed |
| Output Voltage | 1.5 V |
| Maximum Output Current | 500 mA |
| Input Voltage Range | 2.5 V to 10 V |
| Dropout Voltage | 169 mV at 500 mA (typical) |
| Quiescent Current | 85 Β΅A (typical) |
| Line Regulation | 0.01% (typical) |
| Load Regulation | 0.01% (typical) |
| Output Noise | 65 Β΅Vrms (typical) |
| PSRR | 60 dB at 1 kHz (typical) |
| Reset Output | Yes, active low |
| Reset Threshold | 1.35 V (typical) |
| Operating Temperature Range | -55Β°C to +125Β°C |
| Package | HTSSOP-20 (PowerPAD) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
TPS77515-EP Pin Configuration
| Pin 1 | IN β Input voltage |
| Pin 2 | GND β Ground |
| Pin 3 | EN β Enable (active high) |
| Pin 4 | NC β No connect |
| Pin 5 | NC β No connect |
| Pin 6 | NC β No connect |
| Pin 7 | NC β No connect |
| Pin 8 | NC β No connect |
| Pin 9 | NC β No connect |
| Pin 10 | NC β No connect |
| Pin 11 | RESET β Reset output (active low) |
| Pin 12 | NC β No connect |
| Pin 13 | NC β No connect |
| Pin 14 | NC β No connect |
| Pin 15 | NC β No connect |
| Pin 16 | NC β No connect |
| Pin 17 | NC β No connect |
| Pin 18 | NC β No connect |
| Pin 19 | OUT β Regulated output |
| Pin 20 | OUT β Regulated output |
| Pin 21 | PAD β Exposed thermal pad (connect to GND) |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TPS77515-EP is suitable for 6 applications: DSP Power Supply, Microcontroller Power Supply, Battery-Powered Equipment, Industrial Control Systems, Automotive Electronics, FPGA Core Supply.
DSP Power Supply
The TPS77515-EP provides a clean 1.5V rail for DSPs, with fast transient response to handle dynamic load changes. Its low dropout voltage ensures efficient operation from a 2.5V input. The RESET output can hold the DSP in reset until the supply is stable, preventing erratic behavior during power-up. The 500mA output current is sufficient for many DSP cores, and the low quiescent current helps in battery-powered designs.
Recommended
Microcontroller Power Supply
For microcontrollers operating at 1.5V, the TPS77515-EP offers a stable, low-noise supply. Its fast transient response ensures minimal voltage droop during sudden current demands, such as when the MCU wakes from sleep or drives external loads. The RESET output is ideal for generating a power-on reset signal, ensuring the MCU starts reliably. The wide input range allows direct connection to 3.3V or 5V rails.
Recommended
Battery-Powered Equipment
The TPS77515-EP is ideal for battery-powered devices due to its low dropout voltage (169mV) and low quiescent current (85Β΅A). It can regulate a 1.5V output from a battery that discharges down to 2.5V, maximizing battery utilization. The shutdown mode further reduces current draw when the device is idle, extending battery life. The small HTSSOP-20 package fits compact designs.
Recommended
Industrial Control Systems
In industrial environments, the TPS77515-EP provides a reliable 1.5V supply for sensors, actuators, and control logic. Its extended temperature range (-55Β°C to +125Β°C) ensures operation in harsh conditions. The fast transient response handles sudden load changes from motors or relays. The RESET output can be used to monitor the supply and trigger system shutdown if the voltage drops, protecting sensitive equipment.
Recommended
Automotive Electronics
The TPS77515-EP is suitable for automotive applications that require a stable 1.5V rail for sensors, microcontrollers, or communication modules. Its wide input range (2.5V to 10V) accommodates automotive battery voltage variations. The enhanced product version offers improved reliability for mission-critical systems. The RESET output can be used for system monitoring and fault detection.
Recommended
FPGA Core Supply
FPGAs often require multiple supply rails, including a 1.5V core voltage. The TPS77515-EP provides a clean, regulated 1.5V output with fast transient response to handle the dynamic power demands of FPGA logic. The low dropout voltage allows operation from a 1.8V or 2.5V rail. The RESET output can be used to sequence the FPGA's configuration, ensuring proper startup.
Recommended
Recommended Products Summary
Engineering reference data for TPS77515-EP β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS77515 | TPS77516 | TPS77518 | TPS77525 | TPS77533 | NCP1117ST15T3G |
|---|---|---|---|---|---|---|---|
| Package | HTSSOP-20 (PowerPAD) | HTSSOP-20 (PowerPAD) | HTSSOP-20 (PowerPAD) | HTSSOP-20 (PowerPAD) | HTSSOP-20 (PowerPAD) | HTSSOP-20 (PowerPAD) | SOT-223 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | onsemi |
| Output Voltage | 1.5V | 1.5V | 1.6V | 1.8V | 2.5V | 3.3V | 1.5V |
| Output Current | 500mA | 500mA | 500mA | 500mA | 500mA | 500mA | 1A |
| Dropout Voltage | 169mV | 169mV | 169mV | 169mV | 169mV | 169mV | 1.1V |
| Quiescent Current | 85Β΅A | 85Β΅A | 85Β΅A | 85Β΅A | 85Β΅A | 85Β΅A | 5mA |
| Reset Output | Yes | Yes | Yes | Yes | Yes | Yes | No |
| Operating Temperature Range | -55Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C | 0Β°C to +125Β°C |
Key Differentiators
- Enhanced Product (EP) reliability (vs TPS77515)
- Low dropout voltage (vs NCP1117ST15T3G)
- Integrated RESET output (vs NCP1117ST15T3G)
Design Notes
For optimal thermal performance, solder the exposed thermal pad (PAD) of the HTSSOP-20 package to a large copper area on the PCB. Use multiple vias to connect the pad to the ground plane. This helps dissipate heat and reduces junction temperature, especially at high input-to-output voltage differences.
The TPS77515-EP requires a 10Β΅F low ESR output capacitor for stability. Place the capacitor as close to the OUT pin as possible. An input capacitor of at least 1Β΅F is recommended. Use ceramic capacitors with X5R or X7R dielectric for stable performance over temperature.
Ensure the input voltage does not exceed the absolute maximum rating of 10V. The RESET output is open-drain and requires a pull-up resistor. Do not connect the RESET pin directly to a voltage source without a pull-up. Also, avoid operating the device without an output capacitor, as this can cause instability.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified; EP version offers enhanced reliability for harsh environments.
