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LP2988IMM-3.0/NOPB from NS,National Semiconductor

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LP2988IMM-3.0/NOPB

Manufacturer: NS

Micropower, 200 mA Ultra Low-Dropout Low Noise Voltage Regulator with Prog. Power-On Reset Delay 8-VSSOP -40 to 125

Partnumber Manufacturer Quantity Availability
LP2988IMM-3.0/NOPB,LP2988IMM30NOPB NS 2755 In Stock

Description and Introduction

Micropower, 200 mA Ultra Low-Dropout Low Noise Voltage Regulator with Prog. Power-On Reset Delay 8-VSSOP -40 to 125 The **LP2988IMM-3.0/NOPB** is a low-dropout (LDO) voltage regulator manufactured by **Texas Instruments (NS)**.  

### **Specifications:**  
- **Output Voltage:** 3.0V (Fixed)  
- **Output Current:** 150mA  
- **Dropout Voltage:** 300mV (Typical at 150mA)  
- **Input Voltage Range:** 2.5V to 16V  
- **Low Quiescent Current:** 75µA (Typical)  
- **Package:** 8-Pin VSSOP (MSOP)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Accuracy:** ±1.5% (Over Line, Load, and Temperature)  
- **Protection Features:**  
  - Thermal Shutdown  
  - Current Limit  

### **Descriptions:**  
The LP2988IMM-3.0/NOPB is a high-performance LDO regulator designed for battery-powered applications. It provides a stable 3.0V output with low noise and low dropout, making it suitable for portable electronics, microcontrollers, and precision analog circuits.  

### **Features:**  
- **Ultra-Low Dropout Voltage** (300mV at 150mA)  
- **Low Noise Output** (30µVRMS typical)  
- **Fast Transient Response**  
- **Stable with Low-ESR Ceramic Capacitors** (≥1µF)  
- **Low Shutdown Current** (0.01µA typical)  
- **Pb-Free and RoHS Compliant**  

This regulator is ideal for applications requiring precise voltage regulation with minimal power loss.

Application Scenarios & Design Considerations

Micropower, 200 mA Ultra Low-Dropout Low Noise Voltage Regulator with Prog. Power-On Reset Delay 8-VSSOP -40 to 125# Technical Datasheet: LP2988IMM-3.0/NOPB Low-Dropout (LDO) Voltage Regulator

 Manufacturer : Texas Instruments (formerly National Semiconductor - NS)
 Component : LP2988IMM-3.0/NOPB
 Description : 150mA, Ultra-Low-Dropout, Low-Noise, RF Linear Regulator with Shutdown
 Package : 8-Pin VSSOP (MSOP)

---

## 1. Application Scenarios

### Typical Use Cases
The LP2988IMM-3.0/NOPB is a fixed-output (3.0V), ultra-low-dropout linear voltage regulator designed for applications requiring clean, stable power with minimal noise. Its primary use cases include:

*    Battery-Powered Portable Devices:  Smartphones, tablets, digital cameras, and portable medical instruments benefit from its low dropout voltage (typically 85mV at 150mA), extending battery life by allowing operation closer to the battery's discharge threshold.
*    Noise-Sensitive RF and Analog Circuits:  Powering voltage-controlled oscillators (VCOs), phase-locked loops (PLLs), analog-to-digital converters (ADCs), and audio codecs. Its very low output noise (typically 30µVrms, 10Hz to 100kHz) and high power supply rejection ratio (PSRR) prevent noise from coupling into sensitive signals.
*    Post-Regulation for Switching Supplies:  Used as a "clean-up" regulator following a switching DC/DC converter to attenuate switching noise, providing a quiet supply rail for analog or digital ICs.
*    Microcontroller and Memory Power:  Supplying core voltages or I/O voltages for microprocessors, FPGAs, and memory modules where a stable, low-noise supply is critical for reliable operation.

### Industry Applications
*    Consumer Electronics:  Smart home devices, wearables, and multimedia players.
*    Telecommunications:  RF transceivers, baseband processors, and network interface cards.
*    Industrial:  Sensor interfaces, data acquisition systems, and measurement equipment.
*    Medical:  Portable monitors, diagnostic equipment, and hearing aids.
*    Automotive Infotainment:  Audio systems and display modules (note: not for under-hood or safety-critical applications unless specifically qualified).

### Practical Advantages and Limitations

 Advantages: 
*    Ultra-Low Dropout Voltage:  Enables operation with very small headroom (VIN - VOUT), maximizing efficiency and battery life.
*    Excellent Noise Performance:  Integrated bypass capacitor connection (BYP pin) allows noise reduction to ~30µVrms, ideal for RF/analog circuits.
*    High PSRR:  Typically 70dB at 1kHz, effectively rejecting ripple from upstream converters.
*    Low Quiescent Current:  ~85µA typical, beneficial for always-on battery applications.
*    Integrated Features:  Includes enable/shutdown pin (ON/OFF) and error flag (ERROR) for power sequencing and fault monitoring.
*    Stable with Low-ESR Ceramic Capacitors:  Designed for use with small, inexpensive 1µF ceramic capacitors on input and output.

 Limitations: 
*    Fixed Output Voltage:  The LP2988IMM-3.0/NOPB is a fixed 3.0V version. Other voltages require a different variant (e.g., LP2988IMM-2.5).
*    Limited Output Current:  Maximum 150mA. Not suitable for high-power loads.
*    Linear Regulator Inefficiency:  Power dissipation (PDISS = (VIN-VOUT

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