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Texas Instruments TPS61100RGER
- Part No.:
- TPS61100RGER
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
TPS61100RGER.pdf
- Description:
- IC REG DL BOOST/LNR SYNC 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,798
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Product details
Overview
TPS61100RGER from Texas Instruments is a dual-output, single-cell synchronous boost converter with integrated 120 mA LDO. It operates from 0.8 V to 3.3 V input, delivers adjustable boost output up to 5.5 V and supports programmable LDO output (0.9–3.6 V), achieving 95% peak efficiency and 65 µA quiescent current. It enables battery-powered portable electronics requiring two regulated rails - e.g., DSP core + I/O supply in PDAs or digital cameras.
For engineers reviewing the TPS61100RGER datasheet, TPS61100RGER pinout, TPS61100RGER application, or TPS61100RGER equivalent, key selection criteria include its dual-rail capability, ultra-low start-up voltage (0.85 V), auto-discharge function for microcontroller reset integrity, low-EMI antiringing switch, and QFN-24 package thermal performance in space-constrained designs.
Technical Context
The TPS61100RGER implements a fixed-frequency (320–800 kHz) PWM-controlled synchronous boost stage with N-channel/P-channel MOSFETs, delivering up to 1800 mA peak switch current and 95% efficiency. Its dual-stage architecture integrates an independent LDO (120 mA, ±3% accuracy) with separate enable (LDOEN) and sense (LDOSENSE) pins, allowing flexible sourcing from either boost output or battery.
Control logic includes programmable low-battery detection (LBI/LBO1/LBO2 with three thresholds: 400/450/500 mV), power-good (PGOOD) open-drain output, pushbutton startup (ENPB), and auto-discharge (ADEN) via 400 Ω internal switch. Thermal shutdown activates at 140°C with 20°C hysteresis, and undervoltage lockout disables operation below ~0.7 V on VBAT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.8 V to 3.3 V - supports single-cell NiMH/NiCd (0.9–1.6 V) and alkaline batteries down to near-dead state. |
| Boost Output Voltage | Adjustable up to 5.5 V - set via external resistor divider on FB pin; reference voltage = 500 mV ±15 mV. |
| LDO Output Current | 120 mA max at VI ≥ 1.8 V - sufficient for auxiliary rails like memory I/O or sensor bias in portable systems. |
| Peak Switch Current Limit | 1500 mA typical - constrains inductor sizing and ensures safe operation under transient load conditions. |
| Quiescent Current | 65 µA total device - enables >1-year shelf life in always-on battery backup applications. |
| Shutdown Current | 0.5 µA - isolates load from battery during deep sleep, preventing parasitic drain. |
| Oscillator Frequency | 320–800 kHz - balances EMI, inductor size, and light-load efficiency in compact layouts. |
Pinout & Package
TPS61100RGER is housed in a thermally enhanced 24-pin QFN package (RGE), 4 mm × 4 mm × 0.8 mm, with exposed thermal pad (PGND-connected) for efficient heat dissipation in high-current portable applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBAT (22) | Main power input | Accepts 0.8–3.3 V battery source; feeds both boost and LDO stages; UVLO triggers below ~0.7 V. |
| SWN (13,14,16,17) | Boost switch node | Connects to external inductor; integrated antiringing switch clamps ringing to VBAT in DCM mode. |
| VOUT (19,20) | Boost output | Delivers regulated DC output (up to 5.5 V); PGOOD monitors this rail for system sequencing. |
| FB (21) | Boost feedback | Sets output voltage via resistor divider; internal 500 mV reference enables precise adjustment. |
| LDOIN (6) | LDO input | Can be tied to VOUT (for post-regulated rail) or VBAT (for independent second supply). |
| LDOOUT (7) | LDO output | Provides 0.9–3.6 V, ±3% accurate output; short-circuit protected (500 mA limit). |
| LDOSENSE (4) | LDO feedback | Connected to LDOOUT for adjustable versions; internally tied for fixed-voltage variants. |
| EN (2) | Primary enable | Active-high logic control; disables entire device and disconnects load from battery in shutdown. |
| ENPB (24) | Pushbutton enable | Active-low momentary start; allows wake-up without persistent EN signal - ideal for button-triggered boot. |
| ADEN (3) | Auto-discharge enable | Activates 400 Ω internal discharge path to VOUT capacitor - ensures clean microcontroller reset. |
| PGOOD (15) | Power-good indicator | Open-drain output signals valid VOUT; used to enable downstream circuits or LDO stage. |
| LBI (23) | Low-battery input | Accepts scaled battery voltage; comparator thresholds (400/450/500 mV) generate LBO1/LBO2 flags. |
| LBO1/LBO2 (11,12) | Low-battery outputs | Open-drain status flags; encode battery level in 2-bit code - enables multi-threshold supervision. |
| GND (8) | Logic ground | Reference for all control circuitry; must be connected to PGND at single point near GND pin. |
| PGND (9,10) | Power ground | Return path for high-current boost switching; separate from GND to prevent ground shift. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | 95% peak efficiency achieved via integrated N/P-MOSFET pair - eliminates Schottky losses and reduces thermal load. |
| Load disconnect in shutdown | Special high-side PMOS gate control isolates battery from output - prevents standby drain without external FET. |
| Integrated antiringing switch | Clamps SWN node to VBAT during discontinuous conduction - suppresses EMI and simplifies EMI filter design. |
| Programmable low-battery detection | Three user-selectable thresholds (400/450/500 mV) with 10 mV hysteresis - enables precise battery health monitoring. |
| Auto-discharge function | 400 Ω internal switch discharges VOUT capacitor on shutdown - guarantees deterministic microcontroller reset. |
| Separate LDO enable & sense | LDOEN and LDOSENSE allow independent control and precision regulation - supports cascaded or bypassed configurations. |
Applications
| Handheld Digital Camera Power System | PDA Core + I/O Supply Management |
|---|---|
|
Use Scenario: Single-cell NiMH battery powers image sensor (2.8 V), processor core (1.2 V), and LCD interface (3.3 V) in compact camera body. IC Role / Device Role / Timing Role: TPS61100RGER generates 3.3 V boost rail for LCD and 1.2 V LDO rail for CPU core - both regulated from same 1.2 V nominal cell. Use Value: 0.85 V start-up enables full functionality until battery reaches 0.9 V; auto-discharge ensures clean sensor reset between shots. |
Use Scenario: Dual-rail PDA requires stable 3.3 V for peripherals and 1.5 V for ARM9 core, powered by one alkaline cell. IC Role / Device Role / Timing Role: TPS61100RGER provides 3.3 V boost output and 1.5 V LDO output - both independently enabled and sequenced via PGOOD and LDOEN. Use Value: Pushbutton startup (ENPB) enables instant-on UX; low 65 µA quiescent current extends standby time beyond 30 days. |
| Digital Audio Player Battery Supervisor | Portable Medical Sensor Node |
|
Use Scenario: MP3 player uses single NiMH cell; firmware must warn user at 20%, 10%, and critical battery levels. IC Role / Device Role / Timing Role: TPS61100RGER's LBI/LBO1/LBO2 outputs encode three battery thresholds - decoded by MCU GPIOs without ADC. Use Value: Programmable 400/450/500 mV thresholds map directly to 1.1 V / 1.23 V / 1.37 V battery voltages - enables precise fuel gauging. |
Use Scenario: Wireless ECG sensor runs from coin cell; must shut down cleanly when battery drops below 1.0 V to preserve data integrity. IC Role / Device Role / Timing Role: TPS61100RGER supplies 3.0 V to analog front-end and 1.8 V to BLE radio; LBO flags trigger graceful firmware shutdown. Use Value: Undervoltage lockout (~0.7 V) prevents erratic behavior; 0.5 µA shutdown current minimizes self-discharge during storage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Single-output, higher current (10 A), no integrated LDO; 2.7–12 V input; 3.5–18 V output. | Requires external LDO for second rail; better suited for high-power USB-PD or industrial sensors than space-constrained portables. | Select when >500 mA boost current is needed and board area permits discrete LDO + layout complexity. |
| MAX8647ETE+ | Dual-output (boost + LDO), but LDO is fixed 1.8 V only; 0.7–5.5 V input; 2.5–5.5 V boost output; 16-pin TQFN. | Lacks adjustable LDO and programmable LBI thresholds; lower integration for battery supervision. | Choose when fixed 1.8 V auxiliary rail suffices and simplified BOM outweighs loss of flexibility in battery monitoring. |
Compared with TPS61100RGER, TPS61088RHLR offers higher boost current but requires external components for dual-rail operation, while MAX8647ETE+ provides smaller footprint and lower cost but sacrifices LDO adjustability and multi-threshold battery sensing - making TPS61100RGER optimal for compact, feature-rich portable designs needing precise dual-rail control and battery intelligence.
Availability
TPS61100RGER is available at Aetrix Electronics and suitable for handheld digital cameras, PDAs, portable medical sensors, and internet audio players requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for TPS61100RGER 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 and embedded processing technologies, with decades of expertise in power management ICs for battery-operated systems.
The TPS6110x family was designed specifically for ultra-low-voltage, dual-rail portable electronics - enabling reliable operation from nearly-dead single-cell batteries while integrating supervision, sequencing, and EMI mitigation in one QFN package.
FAQ
What is the minimum input voltage required for TPS61100RGER to start switching?
The TPS61100RGER requires a minimum input voltage of 0.85 V (typical) to initiate boost operation when load resistance is ≥66 Ω and VOUT = 3.3 V. Once started, it continues regulating down to 0.8 V. This ultra-low start-up threshold allows full utilization of single-cell NiMH/NiCd batteries until they reach ~0.9 V, maximizing runtime in devices like digital cameras and PDAs where TPS61100RGER is commonly deployed.
How does the auto-discharge function work in TPS61100RGER, and when should it be enabled?
The TPS61100RGER auto-discharge function activates a 400 Ω internal switch between VOUT and GND when ADEN is high and the device enters shutdown. This discharges output capacitors to prevent residual voltage from keeping microcontrollers or memory active. It should be enabled in systems requiring deterministic power-down - such as TPS61100RGER-based medical sensors or audio players - where uncontrolled wake-up or data corruption must be avoided.
Can TPS61100RGER generate two independent output voltages simultaneously, and how are they configured?
Yes, TPS61100RGER delivers two independent regulated outputs: a programmable boost rail (up to 5.5 V) via VOUT/FB, and a separately controllable LDO rail (0.9–3.6 V) via LDOOUT/LDOSENSE. The LDO can be powered from VOUT (for post-regulation) or directly from VBAT (for independent sourcing). Both outputs have dedicated enables (EN and LDOEN), allowing staggered startup, independent shutdown, and dynamic reconfiguration - essential in TPS61100RGER-based PDA and camera power architectures.
What is the purpose of the dual LBO outputs (LBO1 and LBO2) on TPS61100RGER?
The LBO1 and LBO2 pins on TPS61100RGER provide a 2-bit encoded flag indicating which of three low-battery thresholds (400 mV, 450 mV, 500 mV) has been crossed at the LBI input. Their logic states (0/0, 1/0, 0/1, 1/1) correspond to distinct battery voltage ranges - enabling firmware to distinguish warning, caution, and critical levels without ADC overhead. This feature is actively used in TPS61100RGER implementations for digital audio players and handheld instruments requiring multi-stage battery management.
Does TPS61100RGER support power-save mode, and how is it controlled?
Yes, TPS61100RGER supports power-save mode to improve light-load efficiency. It is enabled by driving SKIPEN high, causing the boost stage to pulse only when output voltage falls below a threshold - reducing switching losses. When SKIPEN is low, the device operates in fixed-frequency PWM mode. This mode is particularly valuable in TPS61100RGER-powered portable devices with variable loads (e.g., camera autofocus bursts followed by idle), extending battery life without sacrificing regulation accuracy.
TPS61100RGER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Topology:
- Step-Up (Boost) Synchronous (1), Linear (LDO) (1)
- Number of Outputs:
- 2
- Frequency - Switching:
- 500kHz
- Voltage/Current - Output 1:
- 1.5V ~ 5.5V, 1.8A
- Voltage/Current - Output 2:
- 0.9V ~ 3.6V, 500mA
- Voltage/Current - Output 3:
- -
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 0.8V ~ 3.3V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VQFN (4x4)
TPS61100RGER FAQ
1.How can I place an order for TPS61100RGER through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61100RGER 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 TPS61100RGER reliable?
The price and inventory of TPS61100RGER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61100RGER is usually 5 days.
3.What payment methods are accepted for TPS61100RGER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61100RGER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61100RGER?
TPS61100RGER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61100RGER 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 TPS61100RGER?
For technical support, including TPS61100RGER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61100RGER requirements.
6.How does Aetrix verify that TPS61100RGER is sourced from the original manufacturer or authorized distributors?
All TPS61100RGER 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 TPS61100RGER meets industry standards.
7.What is the process for return or replacement of TPS61100RGER?
All TPS61100RGER units undergo pre-shipment inspection (PSI). If there is an issue with TPS61100RGER, 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 TPS61100RGER part is unused and in its original packaging.
Return procedure for TPS61100RGER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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