My Inquiry
My Account
Texas Instruments TPS62561DDCR
- Part No.:
- TPS62561DDCR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
TPS62561DDCR.pdf
- Description:
- IC REG BUCK ADJ 600MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:5,782
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS62561DDCR from Texas Instruments is a synchronous step-down DC-DC converter optimized for battery-powered portable applications, delivering up to 600 mA output current from 2.5 V to 5.5 V input sources such as single Li-Ion or AA/AAA cells. It operates at a fixed 2.25-MHz switching frequency in forced-PWM mode only, features ±2.5% output voltage accuracy in PWM mode, 15-μA quiescent current in PFM-equivalent light-load operation, and supports 100% duty-cycle low-dropout operation.
For engineers reviewing the TPS62561DDCR datasheet, TPS62561DDCR pinout, TPS62561DDCR application, or TPS62561DDCR equivalent, this page delivers verified technical context, package-specific pin functions, real-world application mappings, and validated alternative options - all grounded in TI's SLVS815D production data sheet (October 2016 revision).
Technical Context
The TPS62561DDCR uses voltage-mode control with input-voltage feed-forward for fast line/load regulation and stable operation with small ceramic capacitors. Unlike the TPS62560/62, it lacks a MODE pin and operates exclusively in fixed-frequency PWM mode - eliminating automatic PFM/PWM transitions but ensuring predictable EMI behavior and simplified filtering.
Its 5-pin SOT package integrates high-side and low-side MOSFETs with typical RDS(on) of 492 mΩ (high-side) and 391 mΩ (low-side), thermal shutdown at 140°C, undervoltage lockout at 1.85 V (falling), and soft-start with 250 μs VOUT ramp-up time. Feedback is set externally via resistor divider referencing a 600-mV internal reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 5.5 V - supports single-cell Li-ion (2.7–4.2 V), alkaline (3.0–4.5 V), and NiMH (3.0–4.0 V) without external regulators. |
| Output Current | Up to 600 mA - sufficient for powering low-power DSPs, microcontrollers, or RF front-ends in handheld devices. |
| Switching Frequency | 2.25 MHz fixed - enables use of compact 2.2-μH inductors and 10-μF ceramic output capacitors for minimal board area. |
| Quiescent Current | 15 μA (PFM-equivalent light-load) - extends battery life in standby or intermittent-operation modes. |
| Feedback Reference | 600 mV - sets output voltage via external resistor divider (e.g., 1.8 V = 0.6 V × (1 + R1/R2)); allows flexible adjustable outputs from 0.85 V to VIN. |
| Output Voltage Accuracy | ±2.5% in PWM mode - ensures stable supply for sensitive analog or digital loads without post-regulation. |
| Shutdown Current | 0.5 μA - minimizes battery drain when disabled via EN pin. |
Pinout & Package
TPS62561DDCR is housed in a 5-pin TSOT-23 (DDC) package measuring 2.90 mm × 1.60 mm × 1.00 mm, with exposed pad not connected internally and no thermal pad requirement per TI's mechanical data.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 2.5–5.5 V supply; requires ≥4.7 μF ceramic input capacitor close to pin for stability and transient response. |
| GND | Ground reference | Primary return path for power and feedback circuits; must be low-impedance and routed separately from noisy SW node. |
| EN | Enable control | Active-high logic input; pulling low disables converter and reduces current draw to 0.5 μA; supports power sequencing. |
| FB | Feedback sensing | Connects to resistor divider midpoint; regulates output by comparing against 600-mV internal reference; sensitive to noise - route away from SW and inductor. |
| SW | Switch node | Drives external 2.2-μH inductor; carries high di/dt switching current; requires tight layout with minimal loop area to reduce EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.25-MHz PWM operation | Eliminates variable-frequency PFM noise; simplifies EMI filtering and compliance testing for portable audio or RF systems. |
| 100% duty-cycle low-dropout mode | Maintains regulation down to VIN ≈ VOUT + IOUT×(RDS(on) + RL); extends usable battery range in Li-ion applications. |
| Internal soft-start (250 μs) | Limits inrush current during power-up, preventing input voltage sag on weak sources like coin cells or aging batteries. |
| Undervoltage lockout (1.85 V) | Prevents brownout operation and deep battery discharge, protecting cell longevity in consumer handhelds. |
| Synchronous rectification | Integrates high- and low-side MOSFETs (RDS(on) typ. 492 mΩ / 391 mΩ); eliminates external Schottky loss and improves full-load efficiency. |
Applications
| Portable Media Player Power | Low-Power DSP Core Supply |
|---|---|
|
Use Scenario: Powers audio codec and display backlight in sub-500-mA portable media players running from single Li-ion cell. IC Role / Device Role / Timing Role: Primary step-down regulator converting 3.0–4.2 V battery to stable 1.8 V or 3.3 V rail with minimal solution size. Use Value: 2.25-MHz fixed switching enables compact 2.2-μH inductor and 10-μF output cap, reducing PCB area by >40% vs lower-frequency alternatives. |
Use Scenario: Supplies core voltage to TI C5000-series DSPs in battery-operated test equipment requiring clean, regulated 1.2 V at ≤400 mA. IC Role / Device Role / Timing Role: High-efficiency POL regulator with ±2.5% output accuracy and low 15-μA quiescent current during idle cycles. Use Value: Fixed-frequency PWM avoids beat frequencies with DSP clock domains, preventing audible noise in analog signal paths. |
| Point-of-Load for Wearables | Industrial Handheld Scanner |
|
Use Scenario: Delivers 1.2 V to ARM Cortex-M4 MCU and BLE radio in space-constrained wearable health monitors. IC Role / Device Role / Timing Role: Compact, low-noise DC-DC converter supporting dynamic voltage scaling and rapid wake-up from deep sleep. Use Value: 100% duty-cycle operation sustains regulation down to 1.3 V input, enabling full utilization of Li-poly battery discharge curve. |
Use Scenario: Powers image sensor and laser driver in ruggedized barcode scanners operating from 3×AA alkaline packs (4.5 V fresh → 3.0 V end-of-life). IC Role / Device Role / Timing Role: Robust step-down regulator with UVLO (1.85 V) and thermal shutdown (140°C) for unattended field deployment. Use Value: 0.5 μA shutdown current prevents battery drain during multi-week storage; TSOT-23 package fits narrow PCB edge zones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62290DRVR | Higher 3-MHz switching frequency; 1.2-V fixed output option; 2×2-mm WSON package; supports MODE pin for PFM/PWM selection. | Designed for ultra-thin mobile devices needing <1-mm solution height; includes dynamic voltage positioning for load transients. | Select when board space is tighter and PFM flexibility is required; not pin-compatible due to different package (6-pin WSON vs 5-pin SOT) and pinout. |
| TPS62067QDSGRQ1 | AEC-Q100 qualified; 2.5-V to 5.5-V input; 600-mA output; 2.5-MHz fixed frequency; automotive-grade temp range (–40°C to 125°C). | Targeted for automotive infotainment displays and ADAS sensors requiring extended temperature and reliability validation. | Choose for automotive designs needing qualification; same functional capability but larger 6-pin WSON package and higher cost. |
Compared with TPS62561DDCR, TPS62290DRVR offers higher frequency and PFM flexibility in a smaller package but lacks direct pin compatibility, while TPS62067QDSGRQ1 adds AEC-Q100 qualification and extended temperature range at the expense of cost and footprint - making TPS62561DDCR optimal for cost-sensitive, non-automotive portable applications requiring proven 2.25-MHz fixed-PWM performance.
Availability
TPS62561DDCR is available at Aetrix Electronics and suitable for portable media players, low-power DSP supplies, point-of-load (POL) converters, industrial handheld scanners, and wearable electronics requiring stable component supply across design-in, prototyping, and volume production phases.
Supply support for TPS62561DDCR 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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management ICs for industrial, automotive, and consumer markets.
The TPS6256x family was designed specifically for high-efficiency, small-footprint DC-DC conversion in battery-powered portable equipment - emphasizing low quiescent current, fixed-frequency EMI control, and seamless integration with common Li-ion and alkaline power sources.
FAQ
What is the maximum output current supported by the TPS62561DDCR?
The TPS62561DDCR supports up to 600 mA of continuous output current across its full input voltage range (2.5 V to 5.5 V) and operating temperature range (–40°C to 85°C), as specified in TI's SLVS815D datasheet Section 7.5. This rating assumes proper thermal layout, including adequate copper pour on the GND pin and minimal trace resistance on VIN/SW paths. Derating applies above 85°C ambient.
Does the TPS62561DDCR support adjustable output voltage?
Yes, the TPS62561DDCR supports adjustable output voltage from 0.85 V to VIN using an external resistor divider connected to the FB pin. Its internal reference voltage is 600 mV, so VOUT = 0.6 V × (1 + R1/R2). TI recommends R2 = 180 kΩ or 360 kΩ and total divider resistance ≤1 MΩ to balance noise immunity and quiescent current. The TPS62561DDCR does not offer factory-fixed outputs - that function is reserved for the TPS62562 variant.
What package type and dimensions does the TPS62561DDCR use?
The TPS62561DDCR uses the DDC package: a 5-pin TSOT-23 variant measuring 2.90 mm × 1.60 mm × 1.00 mm (length × width × height), with no exposed thermal pad. This differs from the 6-pin 2×2-mm SON package used by TPS62560/62. Pinout is VIN–GND–EN–FB–SW (top view, left-to-right), and the package is RoHS-compliant and lead-free per TI's orderable information in SLVS815D Section 13.
How does the TPS62561DDCR handle light-load efficiency compared to other members of the TPS6256x family?
Unlike the TPS62560 and TPS62562, the TPS62561DDCR operates exclusively in fixed-frequency PWM mode - it has no MODE pin and cannot enter power-save mode (PFM). As a result, its light-load efficiency is lower than those variants but remains stable and predictable. At 1-mA load and 3.6-V input, typical efficiency is ~75%, versus ~85% for TPS62560 in PFM mode. This trade-off prioritizes EMI control over peak efficiency in noise-sensitive applications.
Can the TPS62561DDCR be used with a 1.5-μH inductor?
Yes, the TPS62561DDCR supports inductors from 1.5 μH to 4.7 μH per TI's SLVS815D Section 9.2.2.2. A 1.5-μH inductor increases peak inductor current and output ripple but allows faster transient response and slightly smaller physical size. For stable operation, ensure effective inductance stays ≥1 μH and DCR ≤110 mΩ (as shown in the typical application schematic), and pair with ≥4.7 μF output capacitance. TI validates performance with 2.2 μH, so 1.5 μH requires board-level validation.
TPS62561DDCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.85V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 600mA
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
TPS62561DDCR FAQ
1.How can I place an order for TPS62561DDCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62561DDCR 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 TPS62561DDCR reliable?
The price and inventory of TPS62561DDCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62561DDCR is usually 5 days.
3.What payment methods are accepted for TPS62561DDCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62561DDCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62561DDCR?
TPS62561DDCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62561DDCR 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 TPS62561DDCR?
For technical support, including TPS62561DDCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62561DDCR requirements.
6.How does Aetrix verify that TPS62561DDCR is sourced from the original manufacturer or authorized distributors?
All TPS62561DDCR 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 TPS62561DDCR meets industry standards.
7.What is the process for return or replacement of TPS62561DDCR?
All TPS62561DDCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62561DDCR, 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 TPS62561DDCR part is unused and in its original packaging.
Return procedure for TPS62561DDCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS62561DDCR Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
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…
