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Texas Instruments LP5996SD-1525/NOPB
- Part No.:
- LP5996SD-1525/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LP5996SD-1525/NOPB.pdf
- Description:
- IC REG LINEAR 1.5V/2.5V 10SON
- Quantity:
- Payment:
- Shipping:
Inventory:2,102
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Product details
Overview
LP5996SD-1525/NOPB from Texas Instruments is a dual-output low-dropout linear regulator IC with independent enable control, delivering 150mA on VOUT1 and 300mA on VOUT2 at fixed output voltages of 1.5V and 2.5V respectively. It operates from 2.0V to 6.0V input, achieves 1.5% room-temperature output accuracy, and draws only 35µA quiescent current when enabled - ideal for space-constrained portable power management in handheld wireless devices.
For engineers reviewing the LP5996SD-1525/NOPB datasheet, LP5996SD-1525/NOPB pinout, LP5996SD-1525/NOPB application, or LP5996SD-1525/NOPB equivalent, key selection criteria include dual-rail voltage sequencing capability, ultra-low IQ operation under light load, ceramic-capacitor stability down to 1µF, and thermal shutdown protection in the 3mm × 3mm WSON package.
Technical Context
The LP5996SD-1525/NOPB integrates two independent LDO regulators sharing a common VIN and GND, each with dedicated active-high enable pins (EN1/EN2) enabling precise power rail control and zero-current shutdown. Its internal reference bypass pin (CBYP) supports 10nF capacitor connection to reduce output noise and improve PSRR by up to 70dB at 1kHz.
Designed for portable systems, it uses a PMOS pass transistor architecture to achieve low dropout (210mV at 300mA for LDO2), stable operation with 1µF ceramic output capacitors, and no-load regulation - eliminating need for minimum load resistors in standby modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | Fixed 1.5V (VOUT1) and 2.5V (VOUT2); eliminates external feedback network and ensures consistent rail generation without trimming. |
| Max Output Current | 150mA on LDO1, 300mA on LDO2; supports mixed-signal SoC core and I/O domain powering from single IC. |
| Input Voltage Range | 2.0V to 6.0V; compatible with single-cell Li-ion, Li-polymer, or 3.3V/5V system rails. |
| Quiescent Current | 35µA (both LDOs enabled); enables >1-year battery life in always-on sensor nodes with periodic wake-up. |
| Dropout Voltage | 210mV at 300mA (LDO2); allows 2.5V output from 2.71V input - critical for brownout margin in battery-powered designs. |
| Accuracy | ±1.5% at 25°C, ±3% over −40°C to +125°C junction; meets tight tolerance requirements for ADC references and RF bias rails. |
| PSRR | 70dB at 1kHz (LDO2, CBYP = 10nF); suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
Pinout & Package
LP5996SD-1525/NOPB is housed in a 10-pin WSON (SON-10) package, 3mm × 3mm, 0.5mm pitch, with exposed thermal pad (GND-connected). The package is RoHS-compliant, green (Pb-free, no Sb/Br), and moisture-sensitive level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 2.0–6.0V; requires ≥1µF ceramic decoupling to GND within 1cm for stability. |
| EN1 | LDO1 enable input | Active-high logic control (VIH ≥ 0.95V); pulls LDO1 output to high-impedance when low, drawing <10nA. |
| EN2 | LDO2 enable input | Independent active-high control for second regulator; enables staggered power-up or dynamic rail disable. |
| CBYP | Reference bypass | Connects to 10nF NPO/COG capacitor to reduce reference noise and improve PSRR/transient response. |
| GND | Ground reference | Pins 6 and exposed pad both connect to system ground; pad must be soldered for thermal and electrical performance. |
| VOUT2 | LDO2 output | Delivers fixed 2.5V at up to 300mA; requires ≥1µF ceramic output capacitor with ESR 5–500mΩ. |
| VOUT1 | LDO1 output | Delivers fixed 1.5V at up to 150mA; supports low-voltage digital cores or analog subsystems. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Enables separate power domains (e.g., 1.5V core + 2.5V I/O) with individual ON/OFF control and no cross-talk. |
| Ultra-low quiescent current | 35µA total (both LDOs enabled); reduces standby power loss in battery-backed real-time clocks or sensors. |
| Ceramic-capacitor stability | Stable with 1µF X7R/Y5V/Z5U output caps; eliminates need for larger, costlier tantalum or electrolytic capacitors. |
| Thermal shutdown protection | Triggers at 160°C junction temperature with 20°C hysteresis; prevents permanent damage during overload or poor PCB heatsinking. |
| No-load regulation | Maintains output voltage accuracy even with zero load current - essential for memory backup or always-on monitoring circuits. |
Applications
| Mobile Baseband Power | WLAN/BT Module Supply |
|---|---|
|
Use Scenario: Dual-rail power for cellular baseband processors requiring 1.5V core and 2.5V interface voltage. IC Role / Device Role / Timing Role: Primary LDO regulator providing clean, sequenced, low-noise supplies with independent enable for power-state transitions. Use Value: Eliminates need for two discrete regulators, reducing BOM count and PCB area while maintaining <±3% output accuracy across temperature. |
Use Scenario: Powering 2.4GHz WLAN and Bluetooth combo modules with strict RF noise requirements. IC Role / Device Role / Timing Role: Low-noise LDO supplying 2.5V RF front-end and 1.5V digital logic, with CBYP filtering to meet spectral mask limits. Use Value: 70dB PSRR at 1kHz and 75µVRMS output noise ensure minimal LO phase noise degradation and improved receiver sensitivity. |
| Portable Medical Sensor Hub | Industrial Handheld Terminal |
|
Use Scenario: Battery-powered wearable sensor node integrating ADC, MCU, and BLE radio. IC Role / Device Role / Timing Role: Central power manager delivering 1.5V to ultra-low-power MCU and 2.5V to precision ADC reference. Use Value: 35µA IQ extends coin-cell lifetime beyond 18 months in sleep mode; no-load stability avoids reference drift during sensor idle periods. |
Use Scenario: Ruggedized handheld terminal with barcode scanner, display, and wireless comms operating from 3.7V Li-ion. IC Role / Device Role / Timing Role: Dual LDO generating 1.5V for ARM Cortex-M core and 2.5V for display driver IC and USB PHY. Use Value: 210mV dropout at 300mA allows full 2.5V output until battery drops to 2.71V - maximizing usable battery capacity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC7701QD | Single 1.5V LDO (150mA), no second output; higher IQ (80µA); requires external resistor for adjustable output. | Cannot replace dual-rail functionality; suitable only if 2.5V rail is sourced elsewhere. | Select only when system already provides 2.5V or uses discrete LDO for second rail. |
| TPS79915-25 | Dual-channel, but fixed 1.5V/2.5V outputs in 6-pin DSBGA; lower max current (200mA per channel); no CBYP pin. | Lacks reference bypass for noise-sensitive RF apps; smaller package limits thermal handling at full load. | Prefer for ultra-compact layouts where PSRR >65dB and thermal margin >15°C are acceptable. |
Compared with TLC7701QD and TPS79915-25, the LP5996SD-1525/NOPB uniquely delivers independent enable control, 300mA capability on the 2.5V rail, and CBYP-based noise reduction - making it the only option supporting simultaneous high-current + low-noise dual-rail operation in a single 3mm × 3mm WSON package.
Availability
LP5996SD-1525/NOPB is available at Aetrix Electronics and suitable for mobile communications, portable medical instrumentation, and industrial handheld terminals requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for LP5996SD-1525/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of LDO design expertise and broad automotive/industrial qualification.
The LP5996 series was engineered for portable electronics demanding ultra-low IQ, small footprint, and dual-rail flexibility - targeting cellular handsets, PDAs, and wireless adaptors where board space and battery life are critical constraints.
FAQ
What are the fixed output voltages of the LP5996SD-1525/NOPB?
The LP5996SD-1525/NOPB provides two fixed output voltages: 1.5V on VOUT1 (150mA max) and 2.5V on VOUT2 (300mA max). These values are laser-trimmed during manufacturing and require no external feedback components. The "1525" in the part number explicitly denotes this 1.5V/2.5V configuration, and the LP5996SD-1525/NOPB datasheet confirms these outputs are not adjustable.
Does the LP5996SD-1525/NOPB require external capacitors, and what values are recommended?
Yes, the LP5996SD-1525/NOPB requires an input capacitor (≥1µF ceramic), two output capacitors (≥1µF ceramic per VOUT1/VOUT2), and optionally a 10nF NPO/COG capacitor on CBYP. The LP5996SD-1525/NOPB is optimized for ceramic capacitors with ESR between 5mΩ and 500mΩ; X7R is recommended for wide-temperature stability, though Y5V and Z5U are acceptable in less demanding environments.
How does the enable functionality work on the LP5996SD-1525/NOPB?
The LP5996SD-1525/NOPB features two independent active-high enable inputs: EN1 controls VOUT1 (1.5V), and EN2 controls VOUT2 (2.5V). When either pin is pulled below 0.4V, its corresponding LDO shuts down and draws <10nA. When pulled above 0.95V, the LDO turns on. This allows flexible power sequencing - for example, enabling VOUT1 before VOUT2 - and zero-quiescent-current standby for unused rails.
What thermal protection features does the LP5996SD-1525/NOPB include?
The LP5996SD-1525/NOPB incorporates internal thermal shutdown that activates at 160°C junction temperature, with 20°C hysteresis to prevent oscillation. This protection is fully integrated and requires no external circuitry. The LP5996SD-1525/NOPB's 55°C/W θJA (SON-10 package) means sustained 300mA output at 2.5V with 3.7V input can raise junction temperature significantly - proper PCB copper pour under the exposed pad is essential for reliable operation.
Is the LP5996SD-1525/NOPB compatible with lead-free reflow processes?
Yes, the LP5996SD-1525/NOPB is RoHS-compliant and qualified for lead-free reflow with a moisture sensitivity level (MSL) of 1 (unlimited floor life at ≤30°C/60% RH) and peak reflow temperature of 260°C. Its "/NOPB" suffix confirms green (Pb-free, no Sb/Br) construction, and TI's packaging documentation specifies CU SN lead finish and JEDEC-compliant WSON-10 (DSC) package dimensions for automated assembly compatibility.
LP5996SD-1525/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.5V, 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -, 0.55V @ 300mA
- Current - Output:
- 150mA, 300mA
- Current - Quiescent (Iq):
- 110 µA
- Current - Supply (Max):
- 170 µA
- PSRR:
- 58dB ~ 45dB, 70dB ~ 60dB (1kHz ~ 20kHz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-SON (3x3)
LP5996SD-1525/NOPB FAQ
1.How can I place an order for LP5996SD-1525/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5996SD-1525/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LP5996SD-1525/NOPB reliable?
The price and inventory of LP5996SD-1525/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP5996SD-1525/NOPB is usually 5 days.
3.What payment methods are accepted for LP5996SD-1525/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5996SD-1525/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5996SD-1525/NOPB?
LP5996SD-1525/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5996SD-1525/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LP5996SD-1525/NOPB?
For technical support, including LP5996SD-1525/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5996SD-1525/NOPB requirements.
6.How does Aetrix verify that LP5996SD-1525/NOPB is sourced from the original manufacturer or authorized distributors?
All LP5996SD-1525/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LP5996SD-1525/NOPB meets industry standards.
7.What is the process for return or replacement of LP5996SD-1525/NOPB?
All LP5996SD-1525/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP5996SD-1525/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LP5996SD-1525/NOPB part is unused and in its original packaging.
Return procedure for LP5996SD-1525/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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