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Texas Instruments LP5952TLX-1.5/NOPB
- Part No.:
- LP5952TLX-1.5/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 5-WFBGA, DSBGA
- Datasheet:
-
LP5952TLX-1.5/NOPB.pdf
- Description:
- IC REG LINEAR 1.5V 350MA 5DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LP5952TLX-1.5/NOPB from Texas Instruments is a dual-rail linear regulator designed for ultralow-voltage post-regulation in battery-powered systems, accepting 0.7 V–4.5 V on VIN and 2.5 V–5.5 V on VBATT to deliver a fixed 1.5 V output at up to 350 mA. It features 100 µVRMS output noise, ±1 mV line transient response, and 50 µA typical quiescent current from VBATT - enabling high-efficiency power delivery to core logic or RF circuitry in mobile handsets.
For engineers reviewing the LP5952TLX-1.5/NOPB datasheet, LP5952TLX-1.5/NOPB pinout, LP5952TLX-1.5/NOPB application, or LP5952TLX-1.5/NOPB equivalent, key selection criteria include dual-supply rail compatibility (VIN ≤ VBATT), dropout voltage under 150 mV at 350 mA, thermal shutdown at 165°C, EN-controlled shutdown with 0.1 µA quiescent draw, and DSBGA-5 package suitability for space-constrained portable designs.
Technical Context
The LP5952TLX-1.5/NOPB implements a dual-bias architecture: VBATT powers internal control circuitry (including bandgap reference and protection logic), while VIN supplies the NFET pass device that regulates the 1.5 V output. This separation enables stable operation even when VIN is as low as 0.7 V - critical for post-DC/DC regulation where VIN originates from a buck converter's output.
Its functional block integrates enable management, thermal-overload protection (165°C trip, 20°C hysteresis), short-circuit current limiting, and reverse-current mitigation via the NFET body diode - all operating across –40°C to +125°C junction temperature. The device requires no external compensation and remains stable with 2.2 µF X7R ceramic output capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 1.5 V ±2% tolerance ensures precise biasing of 1.5-V I/O or core rails without external feedback. |
| Max output current | 350 mA continuous - sufficient to power baseband processors, RF transceivers, or sensor hubs in handheld devices. |
| VIN range | 0.7 V to 4.5 V - supports direct connection to low-voltage DC-DC converter outputs (e.g., buck stages stepping down from 3.3 V or 2.5 V). |
| VBATT range | 2.5 V to 5.5 V - compatible with single Li-Ion (2.7–4.2 V) or 3-cell NiMH/NiCd (3.6–4.5 V) batteries. |
| Dropout voltage (VIN) | 128 mV typical at 350 mA (USON package) - minimizes power loss and extends battery runtime in low-headroom conditions. |
| Quiescent current (VBATT) | 50 µA typical - reduces standby power consumption in always-on subsystems like RTC or memory retention circuits. |
| Output noise | 100 µVRMS (10 Hz–100 kHz) - meets stringent noise requirements for analog front-ends and PLL power domains. |
| PSRR (VIN, 1 kHz) | 95 dB - suppresses switching noise from upstream DC-DC converters, preserving signal integrity in sensitive analog blocks. |
Pinout & Package
LP5952TLX-1.5/NOPB is packaged in a 5-pin DSBGA (YZR) with 1.326 mm × 0.96 mm body size and 0.5-mm pitch. The package is optimized for ultra-thin portable applications and requires no thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BATT | Bias supply input | Provides power to internal reference, error amplifier, and protection circuitry; must be ≥ VIN and within 2.5–5.5 V. |
| IN | Power input to pass device | Drives the NFET pass transistor; voltage must be ≤ VBATT and ≥ 0.7 V to maintain regulation at 1.5 V output. |
| GND | Analog/digital ground | Common return path for both bias and power supplies; must connect to low-impedance system ground plane. |
| EN | Enable logic input | Active-high control: VIH ≥ 1 V enables regulation; VIL ≤ 0.4 V forces shutdown with 0.1 µA VBATT current. |
| OUT | Regulated output | Delivers stable 1.5 V to load; requires 2.2 µF ceramic capacitor (X7R, ≤300 mΩ ESR) for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail supply architecture | Separates bias (VBATT) and power (VIN) paths - eliminates need for LDO pre-biasing and enables operation below 1 V VIN. |
| No-load stability | Maintains regulation with zero output current - essential for CMOS RAM keep-alive and always-on sensor nodes. |
| Fast startup time | 70–150 µs from EN assertion to 95% VOUT - supports rapid wake-up sequences in power-gated subsystems. |
| Thermal shutdown with hysteresis | Triggers at 165°C (typical) and resets at 145°C - prevents latch-up during sustained overload while allowing recovery without manual reset. |
| Reverse current protection | Allows up to 50 mA reverse current through internal NFET body diode - avoids need for external Schottky diode in most backup-power scenarios. |
Applications
| Mobile Handset Core Power | Portable Instrument ADC Bias |
|---|---|
Use Scenario: Powers baseband processor I/O banks and modem RF sections in LTE smartphones using a 3.3-V buck converter output as VIN and single-cell Li-Ion as VBATT. IC Role / Device Role / Timing Role: Dual-rail LDO delivering clean 1.5-V supply with <±1 mV line transient response to maintain signal integrity during burst transmission. Use Value: Enables use of lower-VIN DC-DC stages to improve overall system efficiency while meeting tight noise and transient specs for RF front-end ICs. | Use Scenario: Supplies precision 1.5-V reference and analog front-end for 16-bit SAR ADC in handheld multimeters and data loggers powered by 3-cell NiMH. IC Role / Device Role / Timing Role: Low-noise, low-drift post-regulator ensuring ADC reference stability across temperature and load variations. Use Value: 100 µVRMS noise and ±15 mV load transient response preserve effective number of bits (ENOB) during dynamic sampling events. |
| Wearable Sensor Hub | Bluetooth LE SoC Power |
Use Scenario: Provides regulated 1.5-V supply to MEMS motion sensor fusion engine and ultra-low-power MCU in fitness trackers with coin-cell or thin-film battery. IC Role / Device Role / Timing Role: Always-on LDO supporting zero-load retention mode with 50 µA VBATT quiescent current and no external bias components. Use Value: Extends battery life beyond 6 months in sleep-dominated operation while guaranteeing fast wake-up (<150 µs) for motion-triggered sensing. | Use Scenario: Powers Bluetooth 5.0 SoC (e.g., CC2640R2F) core and radio in hearables, using buck converter output (1.8 V) as VIN and Li-Poly (3.0–4.2 V) as VBATT. IC Role / Device Role / Timing Role: High-PSRR (95 dB @ 1 kHz) LDO rejecting switching noise from buck stage to prevent BLE packet errors and RF desense. Use Value: Eliminates need for ferrite beads or additional LC filtering, reducing BOM count and PCB area in compact earbud PCB layouts. |
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 7-channel driver (not dual-rail); 1.8–40 V input; no VBATT pin; 500-mA per channel but not regulated output voltage. | Designed for LED/relay driving, not precision voltage regulation; lacks low-noise performance and thermal shutdown. | Select only if discrete switching loads replace regulated analog/digital rails. |
| TPS7A2015PDQNR | Single-input LDO; 1.5-V fixed output; 300-mA max; 6.5-µA IQ; no VBATT bias rail; 165-mV dropout at 300 mA. | Requires higher VIN (1.65–6.0 V); cannot operate below 1.65 V input - unsuitable for sub-1-V post-regulation architectures. | Use when system uses only one supply rail and VIN ≥ 1.65 V; not viable for dual-rail battery+DC-DC topologies. |
Compared with TPL7407LPGEDR and TPS7A2015PDQNR, LP5952TLX-1.5/NOPB uniquely supports true dual-rail operation with independent VBATT and VIN inputs - enabling efficient, low-noise regulation from ultralow VIN sources while maintaining robust thermal and short-circuit protection across automotive-grade temperature ranges.
Availability
LP5952TLX-1.5/NOPB is available at Aetrix Electronics and suitable for mobile handsets, portable instrumentation, wearable sensor hubs, Bluetooth LE SoC power, and battery-powered medical devices requiring stable component supply with long-term lifecycle support.
Supply support for LP5952TLX-1.5/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 specializing in analog and embedded processing technologies, with leadership in power management ICs for portable and industrial applications.
The LP5952TLX-1.5/NOPB belongs to TI's ultra-low-noise, dual-rail LDO family engineered specifically for post-regulation in battery-powered systems where VIN originates from a DC-DC converter and VBATT connects directly to the battery - targeting high-efficiency, space-constrained portable electronics.
FAQ
What is the minimum required input voltage on the IN pin for LP5952TLX-1.5/NOPB to regulate at 1.5 V?
The LP5952TLX-1.5/NOPB requires a minimum VIN of 0.7 V to initiate regulation, but to sustain 1.5 V output at full 350 mA load, VIN must be ≥ VOUT(NOM) + dropout voltage - typically ≥ 1.628 V (1.5 V + 128 mV) for the USON package. Below this, output voltage droops or regulation fails.
Can LP5952TLX-1.5/NOPB operate with VIN greater than VBATT?
No - the LP5952TLX-1.5/NOPB datasheet explicitly prohibits VIN > VBATT under any condition. Exceeding this violates absolute maximum ratings and may damage the internal NFET pass device or bias circuitry. VIN must always be ≤ VBATT, with recommended margin of ≥0.2 V per electrical characteristics tables.
What is the recommended output capacitor for LP5952TLX-1.5/NOPB and why?
The LP5952TLX-1.5/NOPB requires a 2.2 µF ceramic capacitor (X7R dielectric, ≤300 mΩ ESR) on the OUT pin. This value ensures phase margin >45° and stability across –40°C to +125°C, as validated in TI's characterization. Smaller values risk oscillation; larger values increase start-up time but do not harm stability.
Does LP5952TLX-1.5/NOPB require an input capacitor on the VIN pin?
An input capacitor on VIN is required only when LP5952TLX-1.5/NOPB operates as a stand-alone regulator. In typical post-DC/DC applications, the upstream converter's output capacitor suffices - unless trace length exceeds 5 cm, in which case a local 1-µF ceramic cap is recommended per TI's layout guidelines.
How does the EN pin behavior affect system power sequencing for LP5952TLX-1.5/NOPB?
The EN pin of LP5952TLX-1.5/NOPB provides active-high enable control with VIH ≥ 1 V and VIL ≤ 0.4 V. When pulled low, it disables regulation and reduces VBATT current to 0.1 µA (typical). If unused, EN must be tied to VBATT - floating EN causes undefined operation and potential shoot-through or oscillation.
LP5952TLX-1.5/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):
- 1.5V
- 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-1.5/NOPB FAQ
1.How can I place an order for LP5952TLX-1.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5952TLX-1.5/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-1.5/NOPB reliable?
The price and inventory of LP5952TLX-1.5/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-1.5/NOPB is usually 5 days.
3.What payment methods are accepted for LP5952TLX-1.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5952TLX-1.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5952TLX-1.5/NOPB?
LP5952TLX-1.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5952TLX-1.5/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-1.5/NOPB?
For technical support, including LP5952TLX-1.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5952TLX-1.5/NOPB requirements.
6.How does Aetrix verify that LP5952TLX-1.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LP5952TLX-1.5/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-1.5/NOPB meets industry standards.
7.What is the process for return or replacement of LP5952TLX-1.5/NOPB?
All LP5952TLX-1.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP5952TLX-1.5/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-1.5/NOPB part is unused and in its original packaging.
Return procedure for LP5952TLX-1.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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