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Texas Instruments TPS60121PWPG4
- Part No.:
- TPS60121PWPG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS60121PWPG4.pdf
- Description:
- IC REG CHARGE PUMP 3.3V 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,908
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Product details
Overview
TPS60121PWPG4 from Texas Instruments is a regulated 3.3-V ±4% charge-pump DC/DC converter delivering up to 200 mA output current from a 1.8-V to 3.6-V input (e.g., two alkaline/NiMH cells), featuring integrated power-good detection, 55-µA quiescent current, and no-inductor operation for low-EMI portable power in glucose meters and PDAs.
For engineers reviewing the TPS60121PWPG4 datasheet, TPS60121PWPG4 pinout, TPS60121PWPG4 application, or TPS60121PWPG4 equivalent, key selection criteria include its 3.3-V regulated output with ±4% tolerance, 200-mA continuous load capability at 2-V input, power-good open-drain output (PG), adaptive 1.5×/2× mode switching, and thermally enhanced 20-pin PowerPAD (PWP) package.
Technical Context
The TPS60121PWPG4 implements ACTIVE-CYCLE regulation with fixed-frequency operation under heavy loads and pulse-skip mode at light loads to minimize quiescent current. Its dual single-ended charge-pump architecture automatically selects between 1.5× and 2× voltage conversion based on input voltage and load current to maintain high efficiency across the full 1.8–3.6-V input range.
It integrates a 1.21-V bandgap reference, error amplifier, oscillator, shutdown/start-up control, and a dedicated power-good comparator with 0.86×VO to 0.94×VO trip threshold. The device features undervoltage lockout (1.6 V typ), short-circuit current limit (115 mA), and start-up current limiting to ensure reliable battery-powered operation without external diodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±4% - tightly regulated rail for MCU I/O or analog subsystems without external feedback resistors. |
| Max Output Current | 200 mA - supports moderate-power digital loads (e.g., PDA baseband processors) from two-cell batteries. |
| Input Voltage Range | 1.8 V to 3.6 V - matches discharge profile of two alkaline/NiCd/NiMH cells with no external regulation needed. |
| Quiescent Current | 55 µA - extends battery life in always-on medical instruments like glucose meters during standby. |
| Shutdown Current | 0.05 µA - isolates load and minimizes drain during system sleep, critical for long-term backup operation. |
| Power-Good Output | Open-drain PG pin - signals valid 3.3-V rail to host controller (e.g., microprocessor reset logic) with 90% VO threshold. |
| Switching Frequency | 210–450 kHz - enables compact 2.2-µF flying capacitors and reduces EMI vs. low-frequency alternatives. |
Pinout & Package
The TPS60121PWPG4 is housed in a 20-pin thermally enhanced PowerPAD (PWP) package with exposed thermal pad for improved power dissipation in space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (7,14) | Supply input | Dual-input pins accept 1.8–3.6 V battery source; bypassed to PGND with 10-µF ceramic capacitor. |
| OUT (5,16) | Regulated output | Dual-output pins deliver 3.3 V ±4%; connected via short trace and bypassed with 22-µF ceramic CO. |
| ENABLE (3) | Logic enable input | Active-high control: drives low to enter 0.05-µA shutdown with load disconnection. |
| FB (4) | Feedback input | Internally tied to 1.21-V reference; connect directly to OUT near load for optimal regulation. |
| PG (17) | Power-good output | Open-drain signal pulled low when VO < 90% of nominal; requires external 100-kΩ–1-MΩ pullup to OUT. |
| C1+, C1− (6,8) | Flying capacitor terminals | Interface with 2.2-µF ceramic C1 to implement first charge-pump stage; polarity-sensitive. |
| C2+, C2− (15,13) | Flying capacitor terminals | Interface with second 2.2-µF ceramic C2; completes dual-stage charge-pump topology. |
| PGND (9–12) | Power ground | High-current return path for charge-pump switching; must be low-impedance and tied to thermal pad. |
| GND (1,2,19,20) | Analog ground | Reference ground for bandgap, error amp, and comparators; connect to PGND via short trace. |
| NC (18) | No-connect | Not internally bonded; leave unconnected - distinguishes TPS60121 from low-battery variants (LBI). |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive 1.5×/2× mode switching | Automatically selects optimal gain ratio based on VI and IO to sustain >85% efficiency across full input range. |
| Pulse-skip light-load regulation | Halts switching when VO exceeds regulation window, reducing IQ to 55 µA and eliminating unnecessary ripple. |
| Integrated power-good comparator | Provides system-level power sequencing assurance with 0.90×VO trip point and 0.8% hysteresis. |
| No-inductor architecture | Eliminates magnetic components and associated EMI, enabling ultra-thin PCB layouts in handheld devices. |
| Thermally enhanced PWP package | 20-pin PowerPAD with exposed copper pad achieves 178°C/W θJA, supporting 448 mW at 70°C ambient. |
Applications
| Glucose Meters | PDAs & Organizers |
|---|---|
|
Use Scenario: Portable blood glucose monitoring requiring stable 3.3-V rail from two AA/AAA alkaline cells over full discharge curve. IC Role / Device Role / Timing Role: Primary regulated DC/DC converter generating clean 3.3-V supply for ADC, LCD driver, and microcontroller core. Use Value: Maintains regulation down to 1.8-V input while delivering 200 mA, enabling full-feature operation until battery depletion. |
Use Scenario: Compact personal digital assistant needing efficient step-up conversion for memory and interface ICs powered by dual NiMH cells. IC Role / Device Role / Timing Role: System power manager providing regulated 3.3-V bus with power-good signaling for safe processor boot and reset. Use Value: Pulse-skip mode extends battery runtime during idle periods; PG output prevents firmware corruption during brownout. |
| Medical Handheld Instruments | Backup-Battery Boost Converters |
|
Use Scenario: Battery-powered ultrasound probe or pulse oximeter requiring low-noise, low-EMI 3.3-V supply in RF-sensitive environments. IC Role / Device Role / Timing Role: EMI-optimized charge pump replacing inductor-based converters to avoid interference with analog front-end signals. Use Value: Ceramic-only design (no inductors) and 210–450 kHz switching minimize conducted/radiated emissions per IEC 60601-1. |
Use Scenario: SRAM or real-time clock backup circuit where main supply fails and small Li coin cell must boost to 3.3 V. IC Role / Device Role / Timing Role: Low-quiescent, high-efficiency booster ensuring data retention during main power loss. Use Value: 0.05-µA shutdown current preserves coin-cell life for years; 200-mA peak supports fast capacitor recharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar regulated charge-pump DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS60125PWPG4 | Identical PWP package and 3.3-V output, but rated for 3-V output variant in same family; shares PG function and pinout. | Targeted at systems requiring 3.0-V ±4% output instead of 3.3 V; not interchangeable without revalidation of downstream logic levels. | Select TPS60125PWPG4 only when 3.0-V rail is required; verify load compatibility with tighter 2.88–3.12-V window. |
| MAX860ESA+ | 3.3-V ±4% output, 125-mA max, SO-8 package; lacks PG output and adaptive mode switching; higher 110-µA IQ. | Suitable for lower-current, cost-sensitive designs where power-good signaling and wide-input efficiency are noncritical. | Choose MAX860ESA+ for simpler, lower-cost implementations with ≤125 mA loads and no system-level power sequencing needs. |
Compared with TPS60125PWPG4, the TPS60121PWPG4 provides guaranteed 3.3-V output with identical PG functionality and superior 200-mA capability; versus MAX860ESA+, it delivers 60% higher output current, 50% lower quiescent current, and integrated power-good signaling in a thermally superior package.
Availability
TPS60121PWPG4 is available at Aetrix Electronics and suitable for glucose meters, PDAs, handheld medical instruments, and backup-battery boost converters requiring stable component supply with full lifecycle support.
Supply support for TPS60121PWPG4 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 broad industrial and automotive qualification.
The TPS6012x product line was designed specifically for space-constrained, battery-powered portable electronics requiring high-efficiency, inductorless DC/DC conversion with integrated system-monitoring features like power-good detection.
FAQ
What output voltage does the TPS60121PWPG4 regulate to, and what is its tolerance?
The TPS60121PWPG4 regulates to a nominal 3.3 V with a tolerance of ±4%, meaning the output remains within 3.17 V to 3.43 V across operating conditions including input voltage (1.8–3.6 V), load (0–200 mA), and temperature (–40°C to 85°C). This specification is confirmed in the electrical characteristics table of the SLVS257B datasheet under VO parameter.
Does the TPS60121PWPG4 include a power-good indicator, and how is it implemented?
Yes, the TPS60121PWPG4 includes a dedicated open-drain power-good (PG) output on pin 17. It pulls low when the output voltage falls below approximately 90% of nominal (i.e., <2.97 V) and releases (high-impedance) when VO rises above that threshold. An external 100-kΩ to 1-MΩ pullup resistor to OUT is required, as specified in the terminal functions section of the datasheet.
What is the maximum continuous output current supported by the TPS60121PWPG4, and under what conditions?
The TPS60121PWPG4 supports a maximum continuous output current of 200 mA, verified at 2-V input and across the full operating temperature range (–40°C to 85°C). This rating applies to the TPS60121, TPS60120, TPS60124, and TPS60125 variants; the TPS60122/TPS60123 are limited to 100 mA, as stated in the "Available Options" table of SLVS257B.
How does the TPS60121PWPG4 achieve high efficiency across a wide input voltage range?
The TPS60121PWPG4 achieves high efficiency by automatically selecting between 1.5× and 2× voltage conversion modes based on input voltage and load current. Below ~2.4 V, it operates in doubler mode; above that, it switches to 1.5× mode - minimizing switching losses and maintaining >85% efficiency from 1.8 V to 3.6 V, as shown in Figures 9–11 of the datasheet.
What package type is used for the TPS60121PWPG4, and what thermal advantages does it offer?
The TPS60121PWPG4 uses the 20-pin PowerPAD (PWP) thermally enhanced TSSOP package with an exposed copper thermal pad. This construction delivers a junction-to-ambient thermal resistance (θJA) of 178°C/W and supports 448 mW of continuous power dissipation at 70°C ambient, enabling reliable operation in compact, sealed portable enclosures without forced airflow.
TPS60121PWPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 3.6V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 200mA
- Frequency - Switching:
- 320kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS60121PWPG4 FAQ
1.How can I place an order for TPS60121PWPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS60121PWPG4 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 TPS60121PWPG4 reliable?
The price and inventory of TPS60121PWPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS60121PWPG4 is usually 5 days.
3.What payment methods are accepted for TPS60121PWPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS60121PWPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS60121PWPG4?
TPS60121PWPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS60121PWPG4 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 TPS60121PWPG4?
For technical support, including TPS60121PWPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS60121PWPG4 requirements.
6.How does Aetrix verify that TPS60121PWPG4 is sourced from the original manufacturer or authorized distributors?
All TPS60121PWPG4 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 TPS60121PWPG4 meets industry standards.
7.What is the process for return or replacement of TPS60121PWPG4?
All TPS60121PWPG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS60121PWPG4, 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 TPS60121PWPG4 part is unused and in its original packaging.
Return procedure for TPS60121PWPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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