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Texas Instruments LP5900SD-2.2/NOPB
- Part No.:
- LP5900SD-2.2/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
LP5900SD-2.2/NOPB.pdf
- Description:
- IC REG LINEAR 2.2V 150MA 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,089
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Product details
Overview
LP5900SD-2.2/NOPB from Texas Instruments is a 2.2-V fixed-output, 150-mA ultra-low-noise LDO regulator designed for RF and analog signal chains. It operates from 2.5 V to 5.5 V input, delivers 6.5 μVRMS output noise without bypass capacitor, achieves 75 dB PSRR at 1 kHz, and features 80 mV typical dropout at full load - enabling clean power in cellular handset RF front-ends and wireless LAN transceivers.
For engineers reviewing the LP5900SD-2.2/NOPB datasheet, LP5900SD-2.2/NOPB pinout, LP5900SD-2.2/NOPB application, or LP5900SD-2.2/NOPB equivalent, key selection criteria include its no-bypass-capacitor architecture, 25 μA quiescent current in active mode, −40°C to 125°C junction temperature range, logic-controlled enable with 1-MΩ internal pull-down, and stable operation with only 0.47-μF ceramic input/output capacitors.
Technical Context
The LP5900SD-2.2/NOPB uses an innovative low-noise reference buffer with integrated first-order RC filtering to suppress internal reference noise before reaching the output stage - eliminating need for external noise-bypass capacitors. Its PMOS pass transistor enables ultra-low dropout (80 mV typ. at 150 mA) and near-zero ground current in shutdown (<1 μA).
It integrates thermal-overload protection (trip at ~160°C, hysteresis ~20°C) and short-circuit current limiting (~300 mA). The EN pin has defined VIH (≥1.2 V) and VIL (≤0.4 V) thresholds, with internal 1-MΩ pull-down ensuring default-off behavior when left floating - supporting reliable power sequencing in battery-powered portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.2 V ±2% - ensures precise biasing for 2.2-V RF ICs and analog sensors without external feedback. |
| Max Output Current | 150 mA - sufficient for powering RF transceivers, PLLs, and low-power ADCs in handheld devices. |
| Output Noise | 6.5 μVRMS (10 Hz–100 kHz) - meets stringent spectral purity requirements of GSM/UMTS/Wi-Fi receivers. |
| PSRR | 75 dB at 1 kHz - rejects switching noise from adjacent DC/DC converters feeding the LDO input. |
| Dropout Voltage | 80 mV typ. at 150 mA - enables operation down to 2.28 V input, extending battery runtime in single-cell Li-ion systems. |
| Quiescent Current | 25 μA enabled / <1 μA disabled - minimizes standby power in always-on RF modules and sleep-mode peripherals. |
| Enable Thresholds | VIL ≤0.4 V, VIH ≥1.2 V - compatible with 1.8-V and 3.3-V GPIOs for deterministic ON/OFF control. |
Pinout & Package
LP5900SD-2.2/NOPB is packaged in a 6-pin WSON (NGF) with exposed thermal pad (2.50 mm × 2.20 mm nominal body size), optimized for thermal performance in space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 2.5–5.5 V; requires 0.47-μF ceramic capacitor to GND within 1 cm for stability. |
| 2 (NC) | No internal connection | Unbonded pin - must be left unconnected; not used for thermal or electrical functions. |
| 3 (GND) | Power ground reference | Primary return path for load current and internal circuitry; connects to PCB ground plane. |
| 4 (EN) | Logic enable input | Active-high control: ≥1.2 V enables regulator; ≤0.4 V disables it; internal 1-MΩ pull-down ensures safe default-OFF state. |
| 5 (NC) | No internal connection | Unbonded pin - must be left unconnected; not used for thermal or electrical functions. |
| 6 (OUT) | Regulated output | Delivers stable 2.2 V; requires 0.47-μF ceramic capacitor to GND within 1 cm; low ESR (5–500 mΩ) required. |
| Thermal Pad | Exposed copper pad (bottom) | Must be soldered to PCB ground plane with ≥4 thermal vias (0.3-mm diameter) to achieve RθJB = 20.4°C/W and prevent thermal shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| No noise-bypass capacitor required | Integrated RC-filtered reference eliminates need for external 10-nF bypass cap - reduces BOM count and PCB area by ≥1 mm². |
| Stable with 0.47-μF ceramics | Validated for X5R/X7R 0.47-μF input/output caps - enables use of smallest-case 0402/0603 MLCCs in ultra-thin mobile designs. |
| Ultra-low quiescent current | 25 μA active / <1 μA shutdown - extends battery life in IoT sensors and wearable devices with intermittent RF activity. |
| Fast 150-μs turn-on time | Reaches 95% of 2.2 V in ≤300 μs - supports rapid power cycling of RF sections during TDD burst transmission. |
| Thermal and short-circuit protection | Auto-shutdown at ~160°C with 20°C hysteresis + 300-mA current limit - prevents damage during transient overloads or PCB thermal hotspots. |
Applications
| Cellular Transceiver Power | Wi-Fi/BT RF Front-End |
|---|---|
|
Use Scenario: Supplying LNA, mixer, and PA bias in dual-mode GSM/WCDMA handsets with single-cell Li-ion battery (2.8–4.2 V). IC Role / Device Role / Timing Role: Ultra-low-noise local regulation for RF signal chain - replaces noisy switched supplies and avoids interference in receive band. Use Value: 6.5 μVRMS noise and 75 dB PSRR prevent reciprocal mixing and maintain >35 dB SNR in 20-MHz LTE channels. |
Use Scenario: Powering 2.2-V WLAN/BT combo chip in ultraportable tablets where board space limits capacitor count. IC Role / Device Role / Timing Role: Compact, capacitor-minimized LDO delivering clean VDD_RF - enables direct integration into RF module substrate. Use Value: Stable operation with only two 0.47-μF ceramics reduces solution footprint by 30% vs. legacy LDOs requiring three capacitors. |
| Portable Medical Sensor Bias | Industrial Wireless Node MCU Core |
|
Use Scenario: Providing precision analog supply for 2.2-V ADCs and op-amps in battery-powered ECG/SpO₂ monitors. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage source for analog front-end - decouples sensitive measurement circuitry from digital noise. Use Value: ±2% output tolerance and <110-mV load transient undershoot ensure <0.1% gain error across 0–150 mA dynamic current steps. |
Use Scenario: Supplying 2.2-V core voltage to ultra-low-power MCUs (e.g., MSP430FRxx) in battery-operated IIoT edge nodes. IC Role / Device Role / Timing Role: Enable-controlled system power rail - synchronizes MCU wake-up with sensor acquisition windows. Use Value: 25 μA IQ and 150-μs startup allow sub-10-μA average system current in duty-cycled 1-s wake/sleep cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL720F12-DBVR | Fixed 1.2 V output; 200-mA rating; 12 μVRMS noise; requires 1-μF output cap. | Targeted at lower-voltage digital cores (e.g., 1.2-V SoCs), not RF/analog circuits needing 2.2 V. | Select only if system requires 1.2 V and can accommodate larger output capacitance. |
| TPS7A2022PDQNR | 2.2 V output; 300-mA rating; 7 μVRMS noise; stable with 0.1-μF ceramic; 6.5-μA IQ. | Higher current capability and lower IQ suit longer-life battery apps, but 0.1-μF stability demands tighter layout control. | Prefer when >150 mA load or <10-μA system IQ is critical; verify PCB layout for 0.1-μF stability margin. |
Compared with LP5900SD-2.2/NOPB, TPL720F12-DBVR offers lower noise but mismatches the 2.2-V requirement, while TPS7A2022PDQNR provides higher current and lower IQ but shifts capacitor stability requirements - making LP5900SD-2.2/NOPB optimal for cost-sensitive, space-constrained 2.2-V RF/analog rails where 0.47-μF compatibility is mandatory.
Availability
LP5900SD-2.2/NOPB is available at Aetrix Electronics and suitable for cellular handset RF power, Wi-Fi/BT front-end biasing, and portable medical sensor analog supply requiring stable component supply, long-term lifecycle support, and TI-qualified automotive-grade traceability.
Supply support for LP5900SD-2.2/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 specializing in analog, embedded processing, and digital signal technologies, with leadership in power management innovation since 1930.
The LP5900 product line was engineered specifically for noise-sensitive RF and analog subsystems in portable electronics - prioritizing ultra-low noise, minimal external components, and robust thermal behavior in ultra-thin packages.
FAQ
What is the minimum input voltage required for LP5900SD-2.2/NOPB to regulate at full 150 mA load?
The LP5900SD-2.2/NOPB requires VIN ≥ VOUT + VDO = 2.2 V + 0.08 V = 2.28 V to maintain regulation at 150 mA. Below this, dropout occurs and output voltage drops linearly with input. The device's recommended operating range starts at 2.5 V to ensure margin across temperature and process variation - verified per Section 6.3 of the SNVS358R datasheet.
Can LP5900SD-2.2/NOPB operate without an output capacitor?
No. LP5900SD-2.2/NOPB requires a minimum 0.33-μF ceramic output capacitor (0.47-μF recommended) for stability across all operating conditions. Operation without COUT risks oscillation and loss of regulation. The 0.47-μF value is validated for X5R/X7R dielectrics with ESR between 5 mΩ and 500 mΩ - specified in Section 6.6 and Figure 16 of the LP5900 datasheet.
Is the thermal pad on LP5900SD-2.2/NOPB electrically connected internally?
No. The exposed thermal pad on the LP5900SD-2.2/NOPB WSON package is not internally connected to any silicon node. Per Pin Functions table (Section 5), it must be connected to PCB ground plane or left floating - but never tied to voltage potentials other than GND. TI recommends grounding it via ≥4 thermal vias to achieve RθJB = 20.4°C/W and prevent thermal shutdown under 150-mA load.
Does LP5900SD-2.2/NOPB support reverse current blocking?
No. LP5900SD-2.2/NOPB does not integrate reverse current blocking. When VOUT > VIN, current can flow backward from output to input through the pass transistor's body diode. This behavior is documented in TI application note SLVA490 - designers requiring reverse blocking must add an external Schottky diode in series with the input or select a different LDO family (e.g., TPS7A20) that specifies reverse current protection.
What is the maximum allowable PCB temperature rise when LP5900SD-2.2/NOPB delivers 150 mA at 2.5 V input?
At VIN = 2.5 V and VOUT = 2.2 V, power dissipation is (2.5 − 2.2) V × 0.15 A = 45 mW. With RθJA = 79.8°C/W (WSON NGF), max ΔT = 45 mW × 79.8°C/W ≈ 3.6°C above ambient. To stay below TJMAX = 125°C, ambient must remain ≤121.4°C - but derating per Section 6.4 requires limiting ambient to ≤85°C for continuous operation, ensuring safe thermal margin with standard PCB copper.
LP5900SD-2.2/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.15V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 50 µA
- Current - Supply (Max):
- 230 µA
- PSRR:
- 85dB ~ 40dB (100Hz ~ 100kHz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (2.2x2.5)
LP5900SD-2.2/NOPB FAQ
1.How can I place an order for LP5900SD-2.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5900SD-2.2/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 LP5900SD-2.2/NOPB reliable?
The price and inventory of LP5900SD-2.2/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP5900SD-2.2/NOPB is usually 5 days.
3.What payment methods are accepted for LP5900SD-2.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5900SD-2.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5900SD-2.2/NOPB?
LP5900SD-2.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5900SD-2.2/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 LP5900SD-2.2/NOPB?
For technical support, including LP5900SD-2.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5900SD-2.2/NOPB requirements.
6.How does Aetrix verify that LP5900SD-2.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LP5900SD-2.2/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 LP5900SD-2.2/NOPB meets industry standards.
7.What is the process for return or replacement of LP5900SD-2.2/NOPB?
All LP5900SD-2.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP5900SD-2.2/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 LP5900SD-2.2/NOPB part is unused and in its original packaging.
Return procedure for LP5900SD-2.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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