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Texas Instruments LM2903BIPWR
- Part No.:
- LM2903BIPWR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2903BIPWR.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,618
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Product details
Overview
LM2903BIPWR from Texas Instruments is a dual precision voltage comparator designed for industrial and automotive applications requiring high supply voltage tolerance, low offset, and robust ESD performance. It operates from 2 V to 36 V, delivers ±0.37 mV typical input offset voltage, 1 µs propagation delay, 3.5 nA input bias current, and supports rail-to-rail common-mode input down to ground - used in server PSUs, motor drives, and building automation systems.
For engineers reviewing the LM2903BIPWR datasheet, LM2903BIPWR pinout, LM2903BIPWR application, or LM2903BIPWR equivalent, key selection criteria include its extended temperature range (–40°C to +125°C), 2 kV HBM ESD rating, WSON-8 package with thermal pad, open-collector output compatibility with TTL/MOS/CMOS, and drop-in replacement capability for legacy LM2903 variants.
Technical Context
The LM2903BIPWR implements two independent comparators with dedicated input ESD clamps, enabling operation across a wide supply range while maintaining low quiescent current (600 µA typ at 5 V). Its input stage supports common-mode voltages down to ground and up to VCC – 2 V, with differential input range extended to ±38 V.
Output stage uses open-collector NPN transistors capable of sinking up to 21 mA per channel, compatible with external pull-up resistors to any logic family. Propagation delay is specified at 1 µs under 5 mV overdrive with 15 pF load, and thermal performance is enhanced by the exposed thermal pad connected directly to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - enables direct use in 12 V/24 V industrial rails and battery-backed systems without regulation. |
| Input Offset Voltage (max) | ±4 mV over –40°C to +125°C - ensures accurate threshold detection in temperature-varying environments like motor control. |
| Propagation Delay | 1 µs typical (5 mV overdrive) - supports fast response in overvoltage protection and PWM feedback loops. |
| Input Bias Current (typ) | 3.5 nA - minimizes error in high-impedance sensor interfaces such as thermistor or photodiode circuits. |
| ESD Rating (HBM) | ±2000 V - meets IEC 61000-4-2 Level 2 requirements for board-level robustness in factory automation. |
| Quiescent Current | 600 µA total (300 µA per comparator) - suitable for always-on monitoring in energy-sensitive embedded systems. |
| Output Sink Current | 21 mA per channel - drives LEDs, relays, or logic gates directly without buffer stages. |
Pinout & Package
The LM2903BIPWR is housed in an 8-pin WSON package (2.00 mm × 2.00 mm) with an exposed thermal pad on the underside, which must be soldered directly to the PCB ground plane for optimal thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-collector NPN - requires external pull-up; sinks current when active low. |
| 1IN− | Inverting input (Comp 1) | Differential input node; accepts voltages from GND to VCC − 2 V. |
| 1IN+ | Non-inverting input (Comp 1) | Differential input node; same voltage range as 1IN−. |
| GND | Ground reference | Common return path for supply and signals; connects to thermal pad. |
| 2IN+ | Non-inverting input (Comp 2) | Independent input for second comparator; identical specs to 1IN+. |
| 2IN− | Inverting input (Comp 2) | Independent input for second comparator; identical specs to 1IN−. |
| 2OUT | Comparator 2 output | Open-collector NPN - electrically isolated from 1OUT; shares no internal connection. |
| VCC | Positive supply | Single-supply input; supports up to 36 V; powers both comparators. |
| Thermal Pad | Thermal & electrical ground | Exposed copper pad - must be soldered to GND pour for thermal dissipation and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in replacement for LM2903/LM393 | Pin-compatible and functionally identical to legacy parts - enables upgrade without layout change. |
| Rail-to-rail input common-mode range | Includes GND and extends to VCC − 2 V - simplifies interfacing with sensors and DACs referenced to system ground. |
| Low input offset drift over temperature | ±0.37 mV typical at 25°C, ±4 mV max over full –40°C to +125°C range - improves long-term accuracy in thermal cycling environments. |
| Enhanced ESD ruggedness | 2 kV HBM rating via dedicated input clamps - reduces field failure risk in handling and assembly. |
| Wide supply voltage operation | 2 V to 36 V single supply - eliminates need for level-shifting in multi-rail systems like UPS and power tools. |
Applications
| Server PSU Monitoring | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Real-time monitoring of +12 V and +5 V rails in redundant server power supplies. IC Role / Device Role / Timing Role: Dual comparator compares sensed rail voltages against precision references to trigger fault latches or shutdown signals. Use Value: ±0.37 mV offset and 1 µs response ensure timely detection of brownout or overvoltage events before downstream damage occurs. | Use Scenario: Overtemperature and overcurrent protection in 3-phase BLDC motor inverters. IC Role / Device Role / Timing Role: Compares analog feedback from current shunts and thermistors against thresholds to assert hardware disable signals. Use Value: Rail-to-rail input range allows direct interface with grounded-sense circuits; 36 V rating supports gate driver supply monitoring. |
| Building Automation Sensor Hub | Wireless Infrastructure Power Sequencing |
Use Scenario: Threshold detection for CO₂, humidity, and occupancy sensors in smart HVAC controllers. IC Role / Device Role / Timing Role: Converts analog sensor outputs into digital logic levels for microcontroller GPIO or interrupt inputs. Use Value: 3.5 nA input bias current prevents loading of high-impedance sensor outputs; low IQ extends battery life in wireless nodes. | Use Scenario: Controlled power-up sequencing of RF transceiver, baseband, and PA modules in small-cell radios. IC Role / Device Role / Timing Role: Generates enable strobes based on voltage ramp completion of multiple DC/DC converters. Use Value: Dual independent channels allow simultaneous monitoring of three or more rails with minimal component count and board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2903DR | SOIC-8 package; same electrical specs but higher RθJA (148.5°C/W vs. 96.9°C/W); no thermal pad. | Suitable for lower-power, non-thermally constrained designs; not recommended for continuous 21 mA sink at high ambient. | Select LM2903DR only if board space allows SOIC footprint and thermal margin exceeds 25°C rise at full load. |
| TLV1702IDR | Rail-to-rail input/output; lower IQ (85 µA); lower VIO (±0.8 mV); max supply 36 V; not drop-in - different pinout and output structure. | Requires redesign for push-pull output and new reference routing; better for low-voltage precision sensing below 5 V. | Choose TLV1702IDR only when precision RRO operation and ultra-low power are mandatory, and layout revision is acceptable. |
Compared with LM2903DR and TLV1702IDR, the LM2903BIPWR uniquely combines WSON thermal efficiency, guaranteed drop-in compatibility with legacy LM2903 footprints, and B-version enhancements - making it optimal for industrial upgrades where reliability, thermal headroom, and design continuity are critical.
Availability
LM2903BIPWR is available at Aetrix Electronics and suitable for server PSU monitoring, industrial motor drive protection, and building automation sensor hubs requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM2903BIPWR 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 leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The LM2903B series belongs to TI's precision comparator product line, engineered specifically for high-reliability industrial control, power management, and safety-critical monitoring applications demanding extended temperature operation and robust parametric stability.
FAQ
What is the maximum supply voltage rating for LM2903BIPWR?
The LM2903BIPWR supports a maximum supply voltage of 36 V, with absolute maximum rating extended to 38 V per the datasheet's Absolute Maximum Ratings table. This allows direct integration into 24 V industrial systems and 36 V battery-powered equipment without external regulation, unlike older LM2903 variants rated only to 32 V.
Does LM2903BIPWR require external pull-up resistors on its outputs?
Yes, LM2903BIPWR features open-collector outputs and requires external pull-up resistors on both 1OUT and 2OUT pins to establish valid logic-high levels. Typical values range from 2.2 kΩ to 10 kΩ depending on speed and load; the device itself does not provide internal pull-ups, and omitting them results in undefined high-state behavior.
Can LM2903BIPWR replace LM2903PWR in an existing design?
Yes, LM2903BIPWR is a direct drop-in replacement for LM2903PWR - same WSON-8 package, identical pinout, and improved specifications including lower offset voltage (±0.37 mV vs. ±1 mV), faster response (1 µs vs. 1.3 µs), and higher ESD rating (2 kV vs. 2 kV, but with enhanced clamps). No PCB or firmware changes are needed.
What is the purpose of the exposed thermal pad on the LM2903BIPWR package?
The exposed thermal pad on the LM2903BIPWR must be soldered to a PCB ground plane to provide low-thermal-resistance heat dissipation (RθJB = 63.1°C/W) and reduce junction temperature rise during sustained output sinking. It also serves as an electrical ground connection, improving noise immunity and stability - leaving it unconnected degrades thermal performance and may cause erratic operation.
Is LM2903BIPWR suitable for automotive applications?
LM2903BIPWR is qualified for operation from –40°C to +125°C and meets AEC-Q100 stress test requirements for temperature cycling and ESD (2 kV HBM), making it suitable for under-hood and infotainment applications. However, it is not officially AEC-Q100 certified; for automotive production, TI recommends verifying qualification status with the manufacturer's latest automotive-grade part numbers.
LM2903BIPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Collector, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 3V ~ 36V, ±1.5V ~ 18V
- :
- 2.5mV @ 36V
- Voltage - Input Offset (Max):
- 0.025µA @ 5V
- Current - Input Bias (Max):
- 21mA @ 5V
- Current - Output (Typ):
- 600µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 1µs (Typ)
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-TSSOP
LM2903BIPWR FAQ
1.How can I place an order for LM2903BIPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903BIPWR 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 LM2903BIPWR reliable?
The price and inventory of LM2903BIPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903BIPWR is usually 5 days.
3.What payment methods are accepted for LM2903BIPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2903BIPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903BIPWR?
LM2903BIPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903BIPWR 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 LM2903BIPWR?
For technical support, including LM2903BIPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903BIPWR requirements.
6.How does Aetrix verify that LM2903BIPWR is sourced from the original manufacturer or authorized distributors?
All LM2903BIPWR 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 LM2903BIPWR meets industry standards.
7.What is the process for return or replacement of LM2903BIPWR?
All LM2903BIPWR units undergo pre-shipment inspection (PSI). If there is an issue with LM2903BIPWR, 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 LM2903BIPWR part is unused and in its original packaging.
Return procedure for LM2903BIPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2903BIPWR Tags
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LM2903DR
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LM339DR
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LM339PWR
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LM393DT
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