My Inquiry
My Account
Texas Instruments TPS61131PW
- Part No.:
- TPS61131PW
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS61131PW.pdf
- Description:
- IC REG DL BUCK/BST/LNR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,125
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS61131PW from Texas Instruments is a synchronous SEPIC and flyback DC-DC converter with integrated 200-mA reverse-voltage-protected LDO, designed for dual-output power management in portable battery-powered systems. It delivers up to 300 mA at 3.3 V from 1.8–5.5 V input, features 40-μA quiescent current, 500-kHz fixed-frequency PWM operation, and includes power-good, low-battery detection, and thermal protection - used in MP3 players, PDAs, and USB-powered devices.
For engineers reviewing the TPS61131PW datasheet, TPS61131PW pinout, TPS61131PW application, or TPS61131PW equivalent, this page provides verified functional identity, confirmed TSSOP-16 package mapping, validated 16-pin terminal roles, exact output voltage (3.3 V fixed for both DC-DC and LDO stages), and two technically documented alternative parts with explicit functional and application differences.
Technical Context
The TPS61131PW implements a fixed-frequency (400–600 kHz) synchronous SEPIC topology with NMOS/PNOS switch pair, enabling buck-boost regulation across input voltages both below and above 3.3 V. Its controller uses multiple feedforward paths-monitoring VBAT, VOUT, and SWN voltage drop-to directly adjust duty cycle without relying solely on error amplifier loop dynamics.
It integrates a standalone LDO stage with 300-mV dropout at 200 mA, independently enabled via LDOEN, and supports back-bias operation when powered from external rails (e.g., USB). The device includes dedicated control logic for soft-start (50% initial duty cycle, 40% current limit), undervoltage lockout (~1.6 V), and antiringing switching to suppress EMI during discontinuous conduction mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DC-DC Output Voltage | Fixed 3.3 V - eliminates external feedback resistor network; stable for powering 3.3-V logic, I/O, and peripherals. |
| LDO Output Voltage | Fixed 3.3 V - matches DC-DC rail for dual-rail redundancy or independent load regulation without external dividers. |
| Input Voltage Range | 1.8 V to 5.5 V - supports single-cell Li-ion (2.5–4.2 V), dual/triple alkaline/NiMH (2.4–4.5 V), and USB 5-V inputs. |
| Max DC-DC Output Current | 300 mA at 3.3 V - sufficient for microcontrollers, display drivers, and RF modules in portable equipment. |
| Quiescent Current | 40 μA typical - enables >1-year battery life in always-on low-power monitoring applications with 200-mAh cells. |
| Switch Current Limit | 1300 mA typical - ensures robust start-up into capacitive loads and short-term peak demands without latch-off. |
| Oscillator Frequency | 500 kHz nominal - balances efficiency, inductor size (22 µH), and EMI filtering requirements in compact layouts. |
Pinout & Package
TSSOP-16 package (5.00 mm × 4.40 mm body), thermally enhanced with exposed pad connected to PGND; requires standard reflow profile per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBAT (Pin 4) | Primary input supply | Accepts 1.8–5.5 V battery or adapter input; powers both DC-DC and LDO stages. |
| SWP (Pin 1) & SWN (Pin 2) | SEPIC switch terminals | Connect to coupled inductor windings; SWP drives high-side PMOS, SWN drives low-side NMOS in synchronous rectification. |
| VOUT (Pin 16) | DC-DC regulated output | Delivers fixed 3.3 V at up to 300 mA; requires 100-µF low-ESR output capacitor for stability. |
| LDOIN (Pin 9) & LDOOUT (Pin 10) | LDO input and output | LDOIN accepts VBAT or VOUT; LDOOUT delivers fixed 3.3 V at up to 200 mA with 300-mV dropout. |
| EN (Pin 7) & LDOEN (Pin 8) | Independent enable inputs | Active-high logic; EN controls DC-DC stage, LDOEN controls LDO - allows staged power-up or fault-isolated shutdown. |
| PGOOD (Pin 14) & LBO (Pin 13) | Open-drain status outputs | PGOOD signals DC-DC regulation within ±3%; LBO asserts low when LBI voltage drops below 500 mV (hysteresis = 10 mV). |
| GND (Pin 12) & PGND (Pin 3) | Separate ground returns | GND references control circuitry; PGND carries high-current switch return - must tie together at single point near GND pin. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous SEPIC + integrated LDO | Single-chip dual-output solution eliminates discrete LDO IC and reduces BOM count by ≥3 components. |
| Low-battery comparator with LBI/LBO | Programmable threshold (via external divider) and 10-mV hysteresis enable precise battery fuel gauging down to 1.8 V. |
| Power-good output with 30-μs delay | Enables safe sequencing of downstream processors or memory - avoids premature wake-up before rail stabilization. |
| Antiringing switch for EMI reduction | Dampens SW-node oscillation during DCM, lowering radiated emissions without external snubbers or ferrites. |
| Thermal shutdown with 20°C hysteresis | Protects against sustained overload or poor PCB thermal design; resumes operation automatically after cooldown. |
Applications
| Portable Audio Devices | Handheld Industrial Scanners |
|---|---|
|
Use Scenario: MP3 player powered by single-cell Li-ion battery (2.8–4.2 V) requiring stable 3.3-V MCU core and 3.3-V audio codec rails. IC Role / Device Role / Timing Role: TPS61131PW acts as primary buck-boost regulator and secondary post-regulator - generating both VCC_MCU and VCC_CODEC from same input. Use Value: Eliminates need for separate LDO; 40-μA quiescent current extends playback time; PGOOD enables clean processor reset sequencing. |
Use Scenario: Rugged barcode scanner using dual alkaline cells (2.4–3.2 V) powering ARM Cortex-M4 MCU and laser driver. IC Role / Device Role / Timing Role: TPS61131PW supplies 3.3-V logic rail and 3.3-V analog rail - with LDOEN synchronized to laser pulse timing to reduce noise coupling. Use Value: SEPIC topology maintains regulation as battery discharges below 3.3 V; LBO triggers low-power mode before brownout. |
| USB-Powered Test Equipment | Medical Patient Monitor Peripherals |
|
Use Scenario: Portable oscilloscope module drawing power from USB 5-V host while generating isolated 3.3-V digital and analog supplies. IC Role / Device Role / Timing Role: TPS61131PW operates in flyback mode from 5-V USB input - VOUT powers digital section, LDOOUT powers ADC reference and sensor interface. Use Value: Back-bias capable LDO allows seamless switchover to battery if USB disconnects; <3% total DC-DC accuracy ensures measurement integrity. |
Use Scenario: Wearable SpO₂ sensor node using coin-cell battery (2.0–3.0 V) requiring ultra-low-noise 3.3-V supply for analog front-end and BLE radio. IC Role / Device Role / Timing Role: TPS61131PW delivers quiet 3.3-V rail via LDOOUT (PSRR >60 dB @ 100 kHz); DC-DC stage disabled during sleep to minimize leakage. Use Value: Integrated antiringing switch reduces switching noise near sensitive analog traces; 0.2-μA shutdown current preserves battery for multi-week operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Single-output boost (no integrated LDO); higher 4-A switch current; 2.7–12-V input; no LBO/PGOOD. | Requires external LDO for second rail; better suited for high-current single-rail apps like displays. | Select when >500-mA DC-DC output needed and LDO can be added externally; not suitable for space-constrained dual-rail designs. |
| MAX17222ETA+ | Single-output boost with 300-mA capability; 0.4-μA shutdown current; no LDO; no PGOOD/LBO; 0.65-mm WLP package. | Ultra-low IQ for energy harvesting; lacks system supervision features and dual-rail integration. | Select for battery-life-critical IoT sensors where only one regulated rail is required and board area is premium. |
Compared with TPS61131PW, TPS61088RHLR offers higher output current but requires external LDO and lacks battery monitoring, while MAX17222ETA+ achieves lower shutdown IQ but omits all supervision and dual-rail functionality - making TPS61131PW uniquely balanced for compact, feature-rich portable power systems.
Availability
TPS61131PW is available at Aetrix Electronics and suitable for portable medical devices, industrial handheld scanners, and USB-powered test instrumentation requiring stable component supply, long-lifecycle support, and traceable sourcing from authorized channels.
Supply support for TPS61131PW 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 specializing in analog, embedded processing, and power management ICs, with over 50 years of innovation in energy-efficient power conversion.
The TPS6113x product line was engineered specifically for space-constrained, battery-operated portable electronics needing dual regulated outputs - combining SEPIC/flyback topology with integrated LDO to eliminate discrete power stages.
FAQ
What is the fixed output voltage configuration of the TPS61131PW?
The TPS61131PW has fixed 3.3-V output for both its DC-DC converter stage (VOUT) and integrated LDO stage (LDOOUT). Unlike the adjustable TPS61130PW, it requires no external feedback resistors - simplifying layout and ensuring consistent 3.3-V regulation across temperature and load conditions. This makes TPS61131PW ideal for systems targeting standard 3.3-V logic interfaces without trimming overhead.
Does the TPS61131PW support battery-powered operation below 3.3 V?
Yes, the TPS61131PW supports input voltages as low as 1.8 V and maintains regulated 3.3-V output using its synchronous SEPIC topology - enabling continuous operation even as a single Li-ion cell discharges from 4.2 V down to 2.5 V or dual alkaline cells deplete from 3.0 V to 1.8 V. Its 1300-mA switch current limit ensures reliable start-up under cold battery conditions.
How does the LDO stage in the TPS61131PW handle reverse current?
The TPS61131PW LDO includes reverse-voltage protection: when LDOIN falls below LDOOUT, internal circuitry disables the pass element to block reverse current flow. This prevents battery drain through the LDO when external power (e.g., USB) is applied to LDOIN while the DC-DC stage is off - a critical feature for seamless power-source handover in dual-input systems.
Can the TPS61131PW be used without an external inductor?
No - the TPS61131PW requires two external 22-µH coupled inductors (or a single SEPIC transformer) to implement its SEPIC or flyback topology. These magnetics store and transfer energy; omitting them prevents regulation entirely. The datasheet specifies Coiltronics DRQ74-220 or equivalent shielded coupled inductors with tight coupling (k > 0.95) and 1.5-A saturation current.
What is the thermal performance of the TPS61131PW in TSSOP-16 package?
In the TSSOP-16 (PW) package, the TPS61131PW has a junction-to-ambient thermal resistance (RθJA) of 100.5°C/W. At 300-mA load and 3.3-V output from 2.5-V input, typical power dissipation is ~350 mW - resulting in ~35°C junction rise above ambient. For continuous full-load operation, PCB copper pour under the thermal pad and adjacent PGND plane is strongly recommended to maintain TJ < 125°C.
TPS61131PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Topology:
- Step-Down/Step-Up (Buck/Boost) (1), Linear (LDO) (1)
- Number of Outputs:
- 2
- Frequency - Switching:
- 500kHz
- Voltage/Current - Output 1:
- 3.3V, 300mA
- Voltage/Current - Output 2:
- 3.3V, 320mA
- Voltage/Current - Output 3:
- -
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 1.8V ~ 7V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
TPS61131PW FAQ
1.How can I place an order for TPS61131PW through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61131PW 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 TPS61131PW reliable?
The price and inventory of TPS61131PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61131PW is usually 5 days.
3.What payment methods are accepted for TPS61131PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61131PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61131PW?
TPS61131PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61131PW 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 TPS61131PW?
For technical support, including TPS61131PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61131PW requirements.
6.How does Aetrix verify that TPS61131PW is sourced from the original manufacturer or authorized distributors?
All TPS61131PW 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 TPS61131PW meets industry standards.
7.What is the process for return or replacement of TPS61131PW?
All TPS61131PW units undergo pre-shipment inspection (PSI). If there is an issue with TPS61131PW, 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 TPS61131PW part is unused and in its original packaging.
Return procedure for TPS61131PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS61131PW Tags
-
TPS6521905RHBR
Texas Instruments
-
MIC3385YHL-TR
Microchip Technology
-
A4402ELPTR-T
Allegro MicroSystems
-
LM26480SQ-AA/NOPB
Texas Instruments
-
A4402KLPTR-T
Allegro MicroSystems
-
BD71847AMWV-E2
ROHM Semiconductor
-
ADP5040ACPZ-1-R7
Analog Devices Inc.
-
LT3048IDC#TRPBF
Analog Devices Inc.
-
ADP5037ACPZ-R7
Analog Devices Inc.
-
XRP7714ILB-F
MaxLinear, Inc.
-
LTC3260EDE#TRPBF
Analog Devices Inc.
-
LTC3260EMSE#PBF
Analog Devices Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
