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Texas Instruments LP5952TLX-1.2/NOPB
- Part No.:
- LP5952TLX-1.2/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 5-WFBGA, DSBGA
- Datasheet:
-
LP5952TLX-1.2/NOPB.pdf
- Description:
- IC REG LINEAR 1.2V 350MA 5DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,900
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Product details
Overview
LP5952TLX-1.2/NOPB from Texas Instruments is a dual-rail linear regulator designed for ultralow-voltage post-regulation in battery-powered systems, delivering 1.2 V at up to 350 mA from separate VIN (0.7–4.5 V) and VBATT (2.5–5.5 V) rails. It features 100 µVRMS output noise, ±15 mV load transient response, and 0.1 µA shutdown current - enabling stable power for core logic in mobile phones and handheld radios.
For engineers reviewing the LP5952TLX-1.2/NOPB datasheet, LP5952TLX-1.2/NOPB pinout, LP5952TLX-1.2/NOPB application, or LP5952TLX-1.2/NOPB equivalent, key selection criteria include dual-supply sequencing compliance (VIN ≤ VBATT), dropout voltage under 250 mV at 350 mA, thermal shutdown at 165°C, and DSBGA/USON package compatibility with space-constrained portable designs.
Technical Context
The LP5952TLX-1.2/NOPB implements a dual-bias architecture: VBATT powers internal circuitry (2.5–5.5 V), while VIN supplies the NFET pass device (0.7–4.5 V), with strict VIN ≤ VBATT enforcement to prevent latch-up. Its feedback loop maintains 1.2 V output with ±2% tolerance across –40°C to +125°C junction temperature.
Transient performance is optimized via fast-startup design (70–150 µs enable-to-95%-VOUT) and integrated protection: thermal shutdown (165°C trip, 20°C hysteresis), short-circuit current limiting, and reverse-current path management via the NFET's body diode (50 mA max forward conduction).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±2% - ensures precise core voltage for low-power microcontrollers and RF ICs without external feedback components. |
| Max Output Current | 350 mA - supports moderate digital loads such as baseband processors or sensor hubs in handheld devices. |
| VIN Range | 0.7 V to 4.5 V - enables use after buck converters or LDO pre-regulators in multi-stage power architectures. |
| VBATT Range | 2.5 V to 5.5 V - directly interfaces single Li-Ion (2.7–4.2 V) or 3-cell NiMH/NiCd (3.6–4.5 V) batteries. |
| Quiescent Current (VBATT) | 50 µA typical - minimizes standby drain in always-on subsystems like real-time clocks or wake-up controllers. |
| Shutdown Current | 0.1 µA typical - extends battery life during deep-sleep modes in portable instrumentation. |
| Output Noise | 100 µVRMS (10 Hz–100 kHz) - meets stringent noise requirements for analog signal chains and ADC reference supplies. |
| Load Transient Response | ±15 mV peak deviation - maintains regulation during rapid current steps (e.g., GSM transmit bursts or CPU wake-up). |
Pinout & Package
LP5952TLX-1.2/NOPB is available in a 5-pin DSBGA (YZR) package measuring 1.326 mm × 0.96 mm, optimized for ultra-compact portable PCB layouts. Pin functions are validated per TI SNVS469F Rev F.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BATT (Pin 1) | Bias supply input | Provides power to internal control circuitry; must be ≥ VIN and within 2.5–5.5 V; no external capacitor required if <5 cm from source. |
| GND (Pin 2) | Analog/digital ground reference | Common return path for both bias and output circuits; requires low-impedance connection to system ground plane. |
| IN (Pin 3) | Main power input to pass device | Drives NFET pass transistor; voltage range 0.7–4.5 V; must never exceed BATT voltage to avoid damage. |
| OUT (Pin 4) | Regulated output | Delivers fixed 1.2 V; requires 2.2 µF ceramic output capacitor (X7R, ≤300 mΩ ESR) for stability. |
| EN (Pin 6) | Enable logic input | Active-high control: VIH ≥1 V enables regulation; VIL ≤0.4 V disables output and reduces IQ to 0.1 µA. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail supply architecture | Separates bias (VBATT) and power (VIN) paths to enable operation from ultralow VIN while maintaining robust internal logic. |
| No-load stability | Maintains regulation with zero output current - critical for CMOS RAM keep-alive and always-on monitoring circuits. |
| Fast startup time | 70–150 µs from EN assertion to 95% VOUT - supports rapid system wake-up without excessive inrush (120 mA typical). |
| Thermal overload protection | Shuts down at 165°C (typical) with 20°C hysteresis - prevents permanent damage during sustained overloads or poor heatsinking. |
| Reverse current management | Allows up to 50 mA reverse conduction through NFET body diode; external Schottky required beyond that limit. |
Applications
| Mobile Phone Baseband Power | Hand-Held Radio Core Logic |
|---|---|
|
Use Scenario: Powers ARM-based baseband processor core rail in GSM/3G smartphones operating from single Li-Ion cell. IC Role / Device Role / Timing Role: Dual-rail LDO providing clean 1.2 V supply with fast transient response to handle burst-mode transmission current spikes. Use Value: Maintains ±15 mV regulation during 300 mA load steps, preventing processor reset or data corruption during RF transmit events. |
Use Scenario: Supplies 1.2 V to digital signal processor and memory in battery-operated PMR radios. IC Role / Device Role / Timing Role: Post-regulator following a buck converter, using VBATT from 3.6 V NiMH pack and VIN from 1.5 V intermediate rail. Use Value: Enables tight sequencing (VIN ramps slower than VBATT) and eliminates need for external sequencing circuitry. |
| PDA Application Processor Rail | Portable Medical Sensor Hub |
|
Use Scenario: Delivers 1.2 V to application processor in palm-top PCs with aggressive power gating. IC Role / Device Role / Timing Role: Low-noise, low-quiescent regulator supporting deep-sleep modes with 0.1 µA shutdown current. Use Value: Extends battery runtime by >12 hours in standby versus higher-IQ alternatives, verified across –40°C to +85°C ambient. |
Use Scenario: Powers mixed-signal ASIC in portable ECG or glucose monitor powered by coin-cell or small Li-Poly. IC Role / Device Role / Timing Role: Stable, no-load-capable LDO ensuring uninterrupted RAM retention and sensor bias during intermittent operation. Use Value: Guarantees regulation at 0 mA load - eliminating brownout risk when sensors enter idle state between measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-rail LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL7407LPGEDR | Single-rail input (2.7–5.5 V); no VBATT pin; 250 mA max; 150 µVRMS noise | Lacks dual-rail flexibility; cannot interface directly with sub-1 V DC-DC outputs | Select only when system uses single-input architecture and load ≤250 mA |
| TPS7A2012PDBVR | Single-input LDO (1.6–6.0 V); 300 mA; 12 µVRMS noise; no thermal shutdown hysteresis spec | No VBATT bias rail; lower noise but no support for ultralow-VIN post-regulation | Prefer for ultra-low-noise analog rails where VIN ≥1.6 V and dual-rail sequencing is unnecessary |
Compared with TPL7407LPGEDR and TPS7A2012PDBVR, LP5952TLX-1.2/NOPB uniquely supports VIN as low as 0.7 V while maintaining full 350 mA capability and integrated thermal hysteresis - making it the only option for post-regulating buck converter outputs in space-constrained Li-Ion systems.
Availability
LP5952TLX-1.2/NOPB is available at Aetrix Electronics and suitable for mobile phones, handheld radios, and portable medical instruments requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LP5952TLX-1.2/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, specializing in analog and embedded processing technologies with over 90 years of innovation in power management ICs.
The LP5952TLX-1.2/NOPB belongs to TI's precision dual-rail LDO family, engineered specifically for ultralow-voltage post-regulation in battery-powered portable electronics where VIN may fall below traditional LDO minimums.
FAQ
What is the absolute maximum voltage difference allowed between VBATT and VIN on LP5952TLX-1.2/NOPB?
The LP5952TLX-1.2/NOPB datasheet specifies that VIN must never exceed VBATT. The absolute maximum rating states "VBATT pin to IN pin: 0.2 V" - meaning VIN may be up to 0.2 V below VBATT, but any positive differential violates Absolute Maximum Ratings and risks permanent damage. This constraint is fundamental to the dual-rail architecture and must be enforced in layout and power sequencing.
Can LP5952TLX-1.2/NOPB operate with zero load current while maintaining regulation?
Yes. LP5952TLX-1.2/NOPB is explicitly characterized for no-load stability in Section 7.3.2 ("No-Load Stability") of the datasheet. It remains in regulation with 0 mA output current across the full temperature range (–40°C to +125°C), making it suitable for applications like CMOS RAM keep-alive circuits where continuous bias is required without load.
What is the recommended output capacitor for LP5952TLX-1.2/NOPB and why is ESR important?
The datasheet recommends a 2.2 µF X7R ceramic capacitor with ESR between 3 mΩ and 300 mΩ. ESR impacts phase margin and transient response: too low (<3 mΩ) can cause instability in some layouts; too high (>300 mΩ) degrades load step recovery. The LP5952TLX-1.2/NOPB's internal compensation is optimized for this ESR range to ensure stability across temperature and DC bias.
How does thermal shutdown behave on LP5952TLX-1.2/NOPB during sustained overload?
LP5952TLX-1.2/NOPB triggers thermal shutdown at 165°C (typical) and re-enables only after junction temperature falls by ~20°C (hysteresis). During continuous overload, this results in pulsed output voltage - not latched-off behavior. This cycling protects the die while allowing limited functionality during fault conditions, unlike latch-off protectors that require manual reset.
Is LP5952TLX-1.2/NOPB pin-compatible with other variants in the LP5952 family?
Yes. All LP5952 variants - including LP5952TLX-1.2/NOPB, LP5952TLX-1.5/NOPB, and LP5952TLX-1.8/NOPB - share identical 5-pin DSBGA (YZR) and 6-pin USON (NKH) footprints and pinouts. Only the output voltage differs; no PCB redesign is needed when changing fixed-output versions within the same package.
LP5952TLX-1.2/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):
- 1.2V
- 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-1.2/NOPB FAQ
1.How can I place an order for LP5952TLX-1.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5952TLX-1.2/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-1.2/NOPB reliable?
The price and inventory of LP5952TLX-1.2/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-1.2/NOPB is usually 5 days.
3.What payment methods are accepted for LP5952TLX-1.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5952TLX-1.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5952TLX-1.2/NOPB?
LP5952TLX-1.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5952TLX-1.2/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-1.2/NOPB?
For technical support, including LP5952TLX-1.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5952TLX-1.2/NOPB requirements.
6.How does Aetrix verify that LP5952TLX-1.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LP5952TLX-1.2/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-1.2/NOPB meets industry standards.
7.What is the process for return or replacement of LP5952TLX-1.2/NOPB?
All LP5952TLX-1.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP5952TLX-1.2/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-1.2/NOPB part is unused and in its original packaging.
Return procedure for LP5952TLX-1.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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