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Texas Instruments LP5952TLX-1.8/NOPB
- Part No.:
- LP5952TLX-1.8/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 5-WFBGA, DSBGA
- Datasheet:
-
LP5952TLX-1.8/NOPB.pdf
- Description:
- IC REG LINEAR 1.8V 350MA 5DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LP5952TLX-1.8/NOPB from Texas Instruments is a dual-rail linear regulator designed for ultralow-voltage circuits powered by a single Li-Ion cell or 3-cell NiMH/NiCd battery. It delivers a fixed 1.8 V output at up to 350 mA, features 100 µVRMS output noise, 50 µA typical quiescent current from VBATT, and operates across –40°C to +125°C junction temperature. It is used in mobile phones and handheld radios where low-noise, low-quiescent-power post-regulation is critical.
For engineers reviewing the LP5952TLX-1.8/NOPB datasheet, LP5952TLX-1.8/NOPB pinout, LP5952TLX-1.8/NOPB application, or LP5952TLX-1.8/NOPB equivalent, key selection considerations include dual-supply rail operation (VIN and VBATT), dropout voltage ≤150 mV at 350 mA, thermal shutdown at 165°C, enable-controlled shutdown with 0.1 µA quiescent current, and compatibility with 2.2 µF ceramic output capacitance.
Technical Context
The LP5952TLX-1.8/NOPB employs an NFET pass device with internal bias rail (VBATT) powering control circuitry while VIN supplies regulated output current. Its architecture enforces VIN ≤ VBATT at all times to prevent latch-up and ensure safe sequencing in post-DC-DC applications.
It integrates thermal-overload protection (trip at 165°C, hysteresis 20°C), short-circuit current limiting, undervoltage lockout, and reverse-current path management via the NFET's parasitic body diode-limited to 50 mA forward conduction without external Schottky protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2% tolerance ensures stable core logic supply for low-voltage SoCs and RF ICs. |
| Max Output Current | 350 mA continuous output supports baseband processors and memory subsystems in portable devices. |
| Dropout Voltage (VIN) | ≤128 mV at 350 mA (USON package) enables high-efficiency regulation even when input drops near output level. |
| Quiescent Current (VBATT) | 50 µA typical allows >1-year battery life in always-on keep-alive circuits (e.g., RTC, SRAM backup). |
| Noise (10 Hz–100 kHz) | 100 µVRMS supports noise-sensitive analog/RF blocks without requiring additional LDO filtering stages. |
| PSRR (VIN, 100 Hz) | 90 dB suppresses ripple from upstream DC-DC converters, reducing need for large input bulk capacitance. |
| Enable Threshold (VIH/VIL) | VIH ≥1 V, VIL ≤0.4 V provides robust CMOS-compatible control with margin against noise on EN line. |
| Operating Temp Range | –40°C to +125°C junction temperature rating supports automotive infotainment and industrial handheld deployments. |
Pinout & Package
LP5952TLX-1.8/NOPB is packaged in a 6-pin USON (NKH) measuring 2.00 mm × 2.00 mm, optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BATT | Bias supply input | Supplies internal reference, error amplifier, and control logic; must be ≥2.5 V and ≥VIN at all times. |
| IN | Power input | Drives NFET pass device; input range 0.7 V–4.5 V; must never exceed BATT voltage. |
| OUT | Regulated output | Delivers fixed 1.8 V to load; requires 2.2 µF ceramic capacitor (3–300 mΩ ESR) for stability. |
| GND | Analog/digital ground | Common return for all supplies and feedback; must connect to low-impedance PCB ground plane. |
| EN | Logic enable input | Active-high control: VIH ≥1 V enables regulation; VIL ≤0.4 V disables output and reduces VBATT current to 0.1 µA. |
| NC | No connection | Unbonded pin; must remain unconnected and unpopulated on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail supply architecture | Separates bias (VBATT) and power (VIN) paths to enable ultra-low-input-voltage operation down to 0.7 V while maintaining full functionality. |
| No-load stability | Maintains regulation with zero output current-critical for CMOS RAM keep-alive and standby modes without external dummy loads. |
| Fast startup time | 70–150 µs turn-on (to 95% VOUT) enables rapid wake-up from deep sleep states in battery-powered systems. |
| Thermal shutdown with hysteresis | Triggers at 165°C and resets at 145°C, preventing thermal runaway while allowing recovery under intermittent overload conditions. |
| Reverse current protection limit | Allows up to 50 mA reverse conduction through internal body diode; beyond this, external Schottky diode required from OUT to IN. |
Applications
| Mobile Phone Baseband | Handheld Radio RF Front-End |
|---|---|
Use Scenario: Powers ARM-based application processor core and DDR I/O in slim smartphone designs using single-cell Li-Ion battery. IC Role / Device Role / Timing Role: Dual-rail post-regulator providing clean 1.8 V supply after primary buck converter; manages sequencing between VBATT (battery) and VIN (buck output). Use Value: 100 µVRMS noise prevents digital switching noise from coupling into sensitive analog/RF sections, eliminating need for secondary filtering. | Use Scenario: Supplies low-noise 1.8 V bias to RF transceiver IC and power amplifier driver stage in PMR radios. IC Role / Device Role / Timing Role: Low-quiescent LDO delivering stable voltage during burst transmission; EN pin synchronized with TX enable signal for dynamic power gating. Use Value: 50 µA VBATT quiescent current extends battery runtime in listen-before-talk (LBT) duty cycles with long idle periods. |
| PDA Application Processor | Portable Medical Sensor Hub |
Use Scenario: Regulates 1.8 V for FPGA configuration logic and interface peripherals in palm-top PCs with removable NiMH battery packs. IC Role / Device Role / Timing Role: Fixed-output linear regulator operating from 3-cell NiMH (3.6 V nominal); uses EN pin for system-level power sequencing control. Use Value: 90 dB PSRR at 100 Hz rejects switching noise from shared DC-DC source, ensuring reliable FPGA configuration under varying load conditions. | Use Scenario: Powers ultra-low-power microcontroller and analog front-end (AFE) in wearable ECG monitor with coin-cell or Li-Po backup. IC Role / Device Role / Timing Role: Always-on LDO supplying real-time clock (RTC) and SRAM retention during main system shutdown. Use Value: No-load stability and 0.1 µA shutdown current enable multi-year shelf life and extended operational runtime between charges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-rail linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL7407LPGEDR | Single-rail input (2.7–6 V), no VBATT pin; 250 mA max output; higher 250 µA IQ. | Lacks dual-rail architecture-requires higher minimum input voltage and cannot operate below 0.7 V VIN. | Choose only if system lacks separate bias rail and can tolerate reduced efficiency at low VIN. |
| TPS7A1633DRBR | Single-input LDO (3–60 V), 150 mA output, 1.3 µA IQ; no EN pin; fixed 3.3 V output. | Not pin- or functionally compatible; designed for wide-input industrial rails-not ultralow-VIN portable use. | Select only for high-input-voltage, low-quiescent industrial monitoring nodes-not battery-powered ultralow-VIN applications. |
Compared with TPL7407LPGEDR and TPS7A1633DRBR, LP5952TLX-1.8/NOPB uniquely supports sub-1 V input operation via dedicated VBATT biasing, delivers 350 mA at 1.8 V with <130 mV dropout, and achieves 50 µA quiescent current-making it irreplaceable for modern Li-Ion–powered SoC core regulation where input headroom is minimal and noise sensitivity is high.
Availability
LP5952TLX-1.8/NOPB is available at Aetrix Electronics and suitable for mobile phones, handheld radios, personal digital assistants, portable instruments, and battery-powered devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LP5952TLX-1.8/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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LP5952TLX-1.8/NOPB belongs to TI's precision low-dropout regulator product line, engineered specifically for ultralow-voltage, dual-rail post-regulation in space- and power-constrained portable electronics.
FAQ
What is the minimum input voltage required for LP5952TLX-1.8/NOPB to regulate at full 350 mA output?
The LP5952TLX-1.8/NOPB requires VIN ≥ 1.93 V (1.8 V + 130 mV typical dropout) at 350 mA load in USON package. However, its functional VIN range starts at 0.7 V-regulation only begins once VIN exceeds VOUT plus dropout. VBATT must simultaneously be ≥2.5 V and ≥VIN per datasheet constraints.
Can LP5952TLX-1.8/NOPB operate with VIN higher than VBATT?
No. The LP5952TLX-1.8/NOPB explicitly requires VIN ≤ VBATT at all times. Exceeding this violates absolute maximum ratings and may cause malfunction or permanent damage. This constraint is fundamental to its dual-rail architecture and internal biasing scheme.
Is an input capacitor required at the IN pin of LP5952TLX-1.8/NOPB?
Yes-when used as a stand-alone regulator, a 1 µF ceramic capacitor is required between IN and GND. In typical post-DC-DC applications where IN connects directly to a nearby buck converter output, the buck's output capacitor suffices if distance ≤5 cm and proper grounding is maintained.
What is the purpose of the NC pin on LP5952TLX-1.8/NOPB?
The NC pin on LP5952TLX-1.8/NOPB is an unconnected, unbonded terminal in the USON package. It serves no electrical function and must remain unconnected on the PCB-no trace, pad, or solder should be applied to this location.
Does LP5952TLX-1.8/NOPB support reverse current blocking without external components?
No. LP5952TLX-1.8/NOPB contains an NFET pass device with an inherent body diode that conducts reverse current if VOUT > VIN. It permits up to 50 mA reverse conduction; beyond that, an external Schottky diode (cathode to VIN, anode to VOUT) is mandatory to prevent damage or system instability.
LP5952TLX-1.8/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 4.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.2V @ 350mA
- Current - Output:
- 350mA
- Current - Quiescent (Iq):
- 28 µA
- Current - Supply (Max):
- 100 µA
- PSRR:
- 80dB ~ 64dB (10Hz ~ 100kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-DSBGA (1.41x1.08)
LP5952TLX-1.8/NOPB FAQ
1.How can I place an order for LP5952TLX-1.8/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5952TLX-1.8/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 LP5952TLX-1.8/NOPB reliable?
The price and inventory of LP5952TLX-1.8/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP5952TLX-1.8/NOPB is usually 5 days.
3.What payment methods are accepted for LP5952TLX-1.8/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5952TLX-1.8/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5952TLX-1.8/NOPB?
LP5952TLX-1.8/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5952TLX-1.8/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 LP5952TLX-1.8/NOPB?
For technical support, including LP5952TLX-1.8/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5952TLX-1.8/NOPB requirements.
6.How does Aetrix verify that LP5952TLX-1.8/NOPB is sourced from the original manufacturer or authorized distributors?
All LP5952TLX-1.8/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 LP5952TLX-1.8/NOPB meets industry standards.
7.What is the process for return or replacement of LP5952TLX-1.8/NOPB?
All LP5952TLX-1.8/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP5952TLX-1.8/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 LP5952TLX-1.8/NOPB part is unused and in its original packaging.
Return procedure for LP5952TLX-1.8/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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