TPS77515-EP - 500mA Fast Transient LDO | Texas Instruments
MPN: TPS77515-EP ✓ Hoạt độngTPS77515-EP Tóm tắt
A low-dropout (LDO) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is very close to the output voltage. LDOs are essential in power management ICs for providing clean, low-noise supply rails to sensitive analog and digital circuits. The TPS77515-EP belongs to the TPS775xx family, which includes variants with RESET output (TPS775xx) and PG output (TPS776xx).
Key features include a fast transient response, which minimizes output voltage deviation during load steps, and stability with low ESR capacitors. The device also includes a RESET output that monitors the regulated output and provides a reset signal to microprocessors and other digital systems. The TPS77515-EP is specified for the extended industrial temperature range and is part of TI's Enhanced Product line, which offers extended temperature range and improved reliability for mission-critical applications.
Technically, the TPS77515-EP uses a PMOS pass element, which allows for a low dropout voltage and low quiescent current. The fast transient response is achieved through a high-bandwidth error amplifier and a carefully designed compensation network. The device is stable with a 10-µF low ESR capacitor, which simplifies the output capacitor selection and reduces the overall solution footprint.
Typical applications include power supplies for DSPs, microcontrollers, and other digital ICs that require a clean, regulated 1.5V rail. The RESET output is particularly useful in systems that need a reliable power-on reset signal. The device is also suitable for battery-powered equipment, where low dropout voltage and low quiescent current are critical.
When designing with the TPS77515-EP, ensure that the input voltage is at least 2.5V (the minimum input voltage for the 1.5V output) and that the output capacitor is a 10-µF low ESR ceramic capacitor. The RESET output can be used to hold a microcontroller in reset until the output voltage is stable, which is essential for reliable system startup.
Bộ thay thế dễ dàng lắp đặt cho TPS77515-EP — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
TPS77515
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TPS77516
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
TPS77518
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
TPS77525
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
TPS77533
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
TPS77515-EP Tỷ lệ tối đa & tính chất điện
| Kiểu đầu ra | Fixed |
| Điện áp đầu ra | 1.5 V |
| Điện áp tối đa đầu ra | 500 mA |
| Phạm vi điện áp đầu vào | 2.5 V to 10 V |
| Điện áp mất áp | 169 mV at 500 mA (typical) |
| Điện áp yên tĩnh | 85 µA (typical) |
| Line Regulation | 0.01% (typical) |
| Load Regulation | 0.01% (typical) |
| Tiếng ồn đầu ra | 65 µVrms (typical) |
| PSRR | 60 dB at 1 kHz (typical) |
| Reset Output | Yes, active low |
| Reset Threshold | 1.35 V (typical) |
| Khoảng nhiệt độ hoạt động | -55°C to +125°C |
| Hộp | HTSSOP-20 (PowerPAD) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân TPS77515-EP
| Chân 1 | IN — Input voltage |
| Chân 2 | GND — Ground |
| Chân 3 | EN — Enable (active high) |
| Chân 4 | NC — No connect |
| Chân 5 | NC — No connect |
| Chân 6 | NC — No connect |
| Chân 7 | NC — No connect |
| Chân 8 | NC — No connect |
| Chân 9 | NC — No connect |
| Chân 10 | NC — No connect |
| Chân 11 | RESET — Reset output (active low) |
| Chân 12 | NC — No connect |
| Chân 13 | NC — No connect |
| Chân 14 | NC — No connect |
| Chân 15 | NC — No connect |
| Chân 16 | NC — No connect |
| Chân 17 | NC — No connect |
| Chân 18 | NC — No connect |
| Chân 19 | OUT — Regulated output |
| Chân 20 | OUT — Regulated output |
| Chân 21 | PAD — Exposed thermal pad (connect to GND) |
Ứng dụng tiêu biểu
TPS77515-EP phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
Battery-Powered Equipment
The TPS77515-EP is ideal for battery-powered devices due to its low dropout voltage (169mV) and low quiescent current (85µA). 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.
Được đề xuất
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 (-55°C to +125°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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TPS77515-EP — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 | 85µA | 85µA | 85µA | 85µA | 85µA | 85µA | 5mA |
| Reset Output | Yes | Yes | Yes | Yes | Yes | Yes | No |
| Operating Temperature Range | -55°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | 0°C to +125°C |
Bảo phân biệt quan trọng
- Enhanced Product (EP) reliability (vsTPS77515)
- Low dropout voltage (vsNCP1117ST15T3G)
- Integrated RESET output (vsNCP1117ST15T3G)
Ghi chú thiết kế
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 10µF low ESR output capacitor for stability. Place the capacitor as close to the OUT pin as possible. An input capacitor of at least 1µF 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.
Thông tin tuân thủ
RoHS compliant per TI product page. Not AEC-Q100 qualified; EP version offers enhanced reliability for harsh environments.
