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Texas Instruments TPS61202DSCT
- Part No.:
- TPS61202DSCT
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
TPS61202DSCT.pdf
- Description:
- IC REG BOOST 5V 1.2A 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:171
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Product details
Overview
TPS61202DSCT from Texas Instruments is a fixed-output 5-V synchronous boost converter IC designed for low-input-voltage battery-powered systems. It delivers up to 600 mA output current at 5 V (VIN ≥ 3 V), operates from 0.3 V to 5.5 V input, features automatic transition between boost and down-conversion modes, and integrates 1.3-A internal switches in a 3 mm × 3 mm VSON-10 package - used in single-cell Li-ion and alkaline-powered portable medical devices.
For engineers reviewing the TPS61202DSCT datasheet, TPS61202DSCT pinout, TPS61202DSCT application, or TPS61202DSCT equivalent, key selection considerations include its 5-V fixed output, 0.3-V startup capability, Power Save mode control via PS pin, undervoltage lockout programmability, and thermal shutdown protection - all critical for energy-constrained, space-sensitive embedded power designs.
Technical Context
The TPS61202DSCT implements an average current-mode PWM controller with input/output voltage feedforward for fast transient response. Its three-NMOS synchronous topology enables high efficiency across wide VIN–VOUT differentials and supports automatic down-conversion when VIN ≥ VOUT - maintaining regulation without external components.
It integrates dual ground domains (GND for logic, PGND for power switching), a dedicated VAUX supply rail for control-stage biasing, and a configurable UVLO comparator input. The device enters Power Save mode below ~300 mA load (PS = low) and supports forced fixed-frequency operation (PS = high), except during down-conversion where Power Save remains active.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.95–5.05 V - ensures stable 5-V rail for USB-peripheral interfaces and microcontroller I/O without external feedback resistors. |
| Input Voltage Range | 0.3 V to 5.5 V - enables direct startup from deeply discharged single-cell Li-ion (down to 0.5 V) or multi-cell alkaline/NiMH sources. |
| Switch Current Limit | 1200–1500 mA average - limits peak inductor current to protect internal MOSFETs and sustain >600 mA output at 5 V with VIN ≥ 3 V. |
| Quiescent Current | 50–70 μA (PS = low) - minimizes battery drain in always-on portable devices like glucose meters or wearables. |
| Switching Frequency | 1250–1650 kHz - allows use of compact 1–2.2 μH inductors and reduces output ripple without requiring large bulk capacitance. |
| UVLO Threshold | Falling: 235–265 mV; Rising: 330–370 mV - provides hysteresis to prevent oscillation during battery voltage sag and enables custom input monitoring via resistor divider on UVLO pin. |
| Thermal Shutdown | 140 °C activation with 20 °C hysteresis - protects against sustained overload or poor PCB thermal design while enabling self-recovery after cooling. |
Pinout & Package
TPS61202DSCT uses a 3 mm × 3 mm, 10-pin VSON (DSC) package with exposed thermal pad soldered to PGND for optimal thermal performance and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VAUX (Pin 1) | Auxiliary supply output | Provides regulated ~2.4–5.5 V bias for internal control circuitry; must be decoupled with 0.1 μF capacitor near the pin. |
| VOUT (Pin 2) | Regulated output | Delivers fixed 5-V output; connects directly to load and output capacitor (C2); no external feedback required. |
| L (Pin 3) | Inductor connection | High-current path to external boost inductor (L1); requires low-inductance layout to minimize switching noise and losses. |
| PGND (Pin 4) | Power ground | Return path for high-switching-current paths (L, VOUT, internal switches); must be connected to GND at single point near Pin 9. |
| VIN (Pin 5) | Main input supply | Accepts 0.3–5.5 V battery or energy-harvesting source; connects to input capacitor C1 (10 μF ceramic). |
| EN (Pin 6) | Enable control | Active-high digital enable (VIH = 1.2 V min); disables converter and disconnects load from input when low - reducing system standby current to <2 μA. |
| UVLO (Pin 7) | Undervoltage monitor input | Allows external resistor divider to set custom input brownout threshold; left floating or tied to VAUX if unused. |
| PS (Pin 8) | Power Save mode control | Low = enable adaptive frequency reduction at light load; high = force fixed 1.25–1.65 MHz operation - critical for EMI-sensitive applications. |
| GND (Pin 9) | Logic ground | Reference for EN, PS, UVLO, FB; must be isolated from PGND except at single-point tie near Pin 9 to avoid ground bounce. |
| FB (Pin 10) | Feedback input | Internally connected to VOUT for fixed-output variants; must be shorted to VOUT (Pin 2) - not left floating. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic boost/down-conversion mode transition | Enables seamless regulation from 0.3 V startup to 5.5 V input - eliminates need for separate buck/boost ICs in battery-voltage-tracking applications like fuel gauges. |
| Load disconnect during shutdown | Breaks conduction path between VIN and VOUT when EN = low - prevents backfeed, preserves battery charge, and meets IEC 62368-1 isolation requirements. |
| Synchronous 3-MOSFET architecture | Replaces external Schottky diode; achieves >90% efficiency at 300 mA/3.3 V (VIN ≥ 2.4 V) and reduces thermal stress vs. asynchronous designs. |
| Startup into full load at 0.5 V input | Supports immediate system wake-up from ultra-low-power sleep states without auxiliary LDO - essential for energy-harvesting sensor nodes. |
| Output short-circuit protection | Reduces average inductor current limit under fault conditions to prevent thermal runaway and enable safe auto-recovery without latch-off. |
Applications
| Portable Medical Devices | Single-Cell Li-ion Powered Audio |
|---|---|
Use Scenario: Compact blood glucose meter powered by CR2032 coin cell or rechargeable Li-ion pouch. IC Role / Device Role / Timing Role: Primary DC-DC regulator generating stable 5-V rail for microcontroller, display backlight, and analog front-end. Use Value: 0.3-V input capability extends usable battery life to end-of-discharge; load disconnect prevents battery leakage during storage. |
Use Scenario: Bluetooth earbuds with integrated DAC and Class-D amplifier requiring clean 5-V supply from 3.0–4.2 V Li-ion cell. IC Role / Device Role / Timing Role: Boost converter delivering regulated 5 V for audio codec and charging circuitry. Use Value: Down-conversion mode maintains regulation as cell voltage drops below 5 V; Power Save mode minimizes quiescent current during idle periods. |
| Fuel Cell Sensor Modules | Industrial Handheld Scanners |
Use Scenario: Low-power gas detection module powered by miniature methanol fuel cell (0.4–1.2 V output). IC Role / Device Role / Timing Role: Primary power management IC converting variable fuel cell voltage to stable 5-V system rail. Use Value: 0.5-V startup enables operation immediately after fuel cell ignition; UVLO pin allows custom brownout threshold to match fuel cell discharge profile. |
Use Scenario: Rugged barcode scanner using AA alkaline batteries (0.9–1.5 V per cell) powering CMOS image sensor and laser driver. IC Role / Device Role / Timing Role: High-efficiency boost converter supplying 5 V to imaging subsystem and interface logic. Use Value: 600 mA output supports pulsed laser operation; small 3 mm × 3 mm VSON package fits tight mechanical envelopes in ergonomic housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61201DRC | Fixed 3.3-V output; identical pinout, package, and feature set - differs only in internal feedback divider ratio. | Targets 3.3-V MCU and peripheral rails instead of 5-V USB or analog circuits. | Select when system requires 3.3 V and board layout re-use is prioritized over voltage flexibility. |
| MAX77801EWL+T | Higher 2-MHz switching frequency; integrated input OVP (6.8 V); lower 25-μA quiescent current; same 3 mm × 3 mm WLP-12 package but different pinout. | Better suited for ultra-thin wearables needing smaller inductors and tighter EMI control - but requires PCB redesign. | Choose for next-gen designs demanding lower IQ and higher frequency, accepting layout change and sourcing from Maxim Integrated. |
Compared with TPS61202DSCT, TPS61201DRC offers identical form-factor and functionality at 3.3 V, enabling drop-in replacement in voltage-adjusted designs; MAX77801EWL+T provides superior quiescent current and frequency but mandates new layout and lacks down-conversion mode - making it less suitable for wide-input-voltage tracking applications.
Availability
TPS61202DSCT is available at Aetrix Electronics and suitable for portable medical devices, fuel cell sensors, industrial handheld scanners, and single-cell Li-ion audio systems requiring stable component supply with consistent lead times and volume scalability.
Supply support for TPS61202DSCT 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 technologies, with decades of expertise in high-efficiency DC-DC conversion for battery-powered systems.
The TPS6120x product line was engineered specifically for ultra-low-input-voltage boost applications in portable and energy-harvesting systems - emphasizing startup capability below 1 V, seamless mode transition, and minimal external component count.
FAQ
What is the minimum input voltage required to start up the TPS61202DSCT?
The TPS61202DSCT starts up reliably at 0.5 V input voltage, enabling operation from deeply discharged single-cell batteries or low-voltage energy harvesters. This is achieved through optimized internal biasing and a dedicated VAUX rail that powers the control circuitry before VOUT reaches regulation. The TPS61202DSCT maintains this capability across temperature and process variations as verified in TI's SLVS577E datasheet Section 8.5.
Does the TPS61202DSCT require external feedback resistors to set its output voltage?
No, the TPS61202DSCT has a fixed 5-V output internally trimmed to 4.95–5.05 V, so no external feedback resistors are needed. Pin FB (10) must be connected directly to VOUT (Pin 2) as specified in the datasheet Pin Functions table - leaving it unconnected or routing it elsewhere will cause regulation failure. This simplifies design and improves accuracy versus adjustable alternatives like the TPS61200.
How does the Power Save (PS) pin affect the TPS61202DSCT's efficiency and EMI performance?
When PS = low, the TPS61202DSCT enters Power Save mode, reducing switching frequency at light loads to maintain >85% efficiency down to ~1 mA. When PS = high, it forces fixed 1.25–1.65 MHz operation - improving EMI predictability and reducing output voltage ripple, but increasing light-load quiescent current to ~70 μA. The PS pin has standard logic thresholds (VIH = 1.2 V, VIL = 0.4 V) and must not be left floating.
Can the TPS61202DSCT regulate output when input voltage exceeds 5 V?
Yes, the TPS61202DSCT automatically transitions into Down Conversion mode when VIN ≥ VOUT (≥5 V), using synchronous rectifier control to dissipate excess voltage as heat across internal MOSFETs. This avoids external buck stages but increases power loss and thermal demand - datasheet Figure 11 shows efficiency dropping to ~75% at VIN = 5.5 V, 500 mA load. Thermal design must account for this mode.
What is the purpose of the separate GND and PGND pins on the TPS61202DSCT?
GND (Pin 9) serves as the reference for logic-level signals (EN, PS, UVLO, FB), while PGND (Pin 4) carries high-switching currents from the power stage (L, VOUT, internal switches). Separating them prevents ground bounce from corrupting control signals. They must be connected at a single point on the PCB - ideally near Pin 9 - to maintain signal integrity and maximize efficiency, as detailed in Section 13.1 of the TPS61202DSCT datasheet.
TPS61202DSCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.2A (Switch)
- Frequency - Switching:
- 1.25MHz ~ 1.65MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WSON (3x3)
TPS61202DSCT FAQ
1.How can I place an order for TPS61202DSCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61202DSCT 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 TPS61202DSCT reliable?
The price and inventory of TPS61202DSCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61202DSCT is usually 5 days.
3.What payment methods are accepted for TPS61202DSCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61202DSCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61202DSCT?
TPS61202DSCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61202DSCT 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 TPS61202DSCT?
For technical support, including TPS61202DSCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61202DSCT requirements.
6.How does Aetrix verify that TPS61202DSCT is sourced from the original manufacturer or authorized distributors?
All TPS61202DSCT 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 TPS61202DSCT meets industry standards.
7.What is the process for return or replacement of TPS61202DSCT?
All TPS61202DSCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS61202DSCT, 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 TPS61202DSCT part is unused and in its original packaging.
Return procedure for TPS61202DSCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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