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Texas Instruments SN0304078DBVT
- Part No.:
- SN0304078DBVT
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SN0304078DBVT.pdf
- Description:
- IC REG LINEAR SWITCHED CAP REG
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Inventory:2,750
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Product details
Overview
SN0304078DBVT from Texas Instruments is a regulated switched-capacitor voltage converter that delivers a stable 5.0 V output from input voltages ranging from 2.7 V to 5.5 V, supports up to 30 mA load current, operates at 1 MHz internal oscillator frequency, and features shutdown mode with <1 µA quiescent current - ideal for SIM card power supplies in portable communication devices.
For engineers reviewing the SN0304078DBVT datasheet, SN0304078DBVT pinout, SN0304078DBVT application, or SN0304078DBVT equivalent, key selection considerations include its inductorless charge-pump topology, thermal/current protection, SOT23-6 package constraints, and compatibility with ceramic capacitors for low-EMI battery-powered systems.
Technical Context
The SN0304078DBVT uses a fixed-frequency (1 MHz) charge-pump architecture with cycle-skipping regulation to maintain 5.0 V ±3% output across varying input conditions (2.7–5.5 V) and load currents up to 30 mA. It operates in boost mode without inductors by alternately charging and stacking pump capacitor voltage with VIN.
Internal protection includes thermal shutdown at 160°C (recovery at 140°C) and current limiting up to 100 mA short-circuit capability. Enable control accepts logic-level inputs (VIH ≥1.3 V, VIL ≤0.4 V), and ground current drops to ≤1 µA in shutdown - critical for ultra-low-power portable applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±3% over 2.7–5.5 V input and 0–30 mA load - ensures stable supply for 5 V logic or analog circuitry without external feedback tuning. |
| Input Voltage Range | 2.7 V to 5.5 V - supports single-cell Li-ion (3.0–4.2 V), two-cell NiMH/alkaline (2.4–3.6 V), and three-cell alkaline (3.6–4.8 V) battery sources. |
| Switching Frequency | 1 MHz - enables use of small 0.22 µF pump and 2.2 µF input/output ceramic capacitors, reducing board area and cost vs. lower-frequency solutions. |
| Quiescent Current | 65 µA typical (no load), <1 µA in shutdown - extends battery life in standby modes for handheld meters and PCMCIA cards. |
| Output Ripple | 35 mVPP at 30 mA load - meets noise-sensitive requirements for white LED drivers and LCD bias supplies when using low-ESR X7R/X5R ceramics. |
| Protection Features | Thermal shutdown (160°C), current limit (100 mA short-circuit), and ESD-hardened design - eliminates need for external fault management circuitry. |
Pinout & Package
SOT23-6 package (DBV designation), 2.9 mm × 1.6 mm footprint, 1.45 mm height, thermal resistance θJA = 200°C/W - suitable for space-constrained portable PCBs with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Power Supply | Accepts unregulated 2.7–5.5 V; requires local 2.2 µF ceramic decoupling to suppress high-frequency ripple. |
| GND | Ground Reference | Common return for input, output, and enable; must be low-inductance connection to minimize switching noise coupling. |
| EN | Enable Control Input | Active-high logic input; drives device into shutdown (<1 µA IQ) when pulled low (<0.4 V); 100 nA leakage allows direct MCU GPIO control. |
| VOUT | Regulated Output | Delivers 5.0 V ±3% to load; requires 2.2 µF ceramic output capacitor placed adjacent to pin for ripple suppression. |
| CIN | Charge Pump Input Capacitor Terminal | Connects to 0.22 µF ceramic pump capacitor; internal FET switching node - sensitive to layout parasitics. |
| COUT | Charge Pump Output Capacitor Terminal | Connects to second 0.22 µF ceramic capacitor; forms flying-capacitor network with CIN to generate boosted voltage. |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor DC/DC conversion | Eliminates magnetic components, EMI filters, and layout sensitivity - simplifies compliance testing for handheld medical and consumer devices. |
| Low input current ripple | Peak input current limited internally - reduces stress on battery cells and avoids triggering protection circuits in smart card readers. |
| Thermal and current limit protection | Auto-recovering shutdown at 160°C and hard current limit at 100 mA - prevents damage during hot-plug events or output shorts in modems. |
| 1 MHz oscillator with small capacitors | Enables 0.22 µF pump and 2.2 µF I/O ceramics - cuts total BOM cost by ~30% versus 100 kHz charge pumps requiring larger, higher-ESR tantalums. |
Applications
| Smart Card Readers | SIM Card Supplies |
|---|---|
Use Scenario: Powering ISO 7816-compliant contact-based smart cards in point-of-sale terminals and access control units. IC Role / Device Role / Timing Role: Provides regulated 5.0 V supply to card interface ICs during active transaction cycles, with fast transient response to handle burst current demands. Use Value: Maintains 5.0 V ±3% under dynamic 0–30 mA loads and input dips to 2.7 V - ensures reliable card reset and data exchange without voltage brownouts. | Use Scenario: Delivering stable 5 V to subscriber identity module (SIM) slots in GSM/GPRS handsets and IoT cellular modules. IC Role / Device Role / Timing Role: Acts as dedicated SIM power rail generator, isolated from noisy main system rails via shutdown control synchronized to modem sleep states. Use Value: Achieves <1 µA shutdown current and 65 µA quiescent draw - extends standby time in always-connected mobile devices. |
| White LED Drivers | LCD Displays |
Use Scenario: Biasing parallel strings of white LEDs in handheld game consoles and PDAs where battery voltage falls below forward voltage. IC Role / Device Role / Timing Role: Boosts available battery voltage to drive LEDs at constant current using external current-setting resistors. Use Value: Delivers low-noise 5.0 V with 35 mVPP ripple - minimizes visible flicker and improves perceived brightness uniformity. | Use Scenario: Supplying VCC and VBIAS rails for monochrome or color STN/TFT LCD panels in notebook peripherals and industrial HMIs. IC Role / Device Role / Timing Role: Generates clean, regulated 5.0 V for display controller logic and segment driver ICs independent of main system supply fluctuations. Use Value: Ensures stable contrast and reduced ghosting via tight 5.0 V ±3% regulation and fast load transient recovery (<10 µs). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switched-capacitor voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS60403DBVR | Same SOT23-6 package, 5.0 V output, but higher 60 mA output current and 2.5 V min input; no thermal shutdown. | Supports heavier loads in modems and PCMCIA cards; lacks thermal protection for sustained overload scenarios. | Select when >30 mA continuous output is required and thermal margin is managed externally. |
| MAX680ESA+ | 5 V output, SO-8 package, ±5% output tolerance, no enable pin, 100 mA short-circuit rating. | Requires larger PCB area and lacks shutdown control - unsuitable for battery-critical handheld meters. | Choose only if board space permits SO-8 and enable functionality is not needed. |
Compared with TPS60403DBVR and MAX680ESA+, the SN0304078DBVT offers tighter output regulation (±3% vs. ±5%), integrated thermal shutdown, and ultra-low shutdown current (<1 µA), making it optimal for space- and power-constrained portable designs where reliability under variable load and temperature is critical.
Availability
SN0304078DBVT is available at Aetrix Electronics and suitable for smart card readers, SIM card supplies, and white LED drivers requiring stable component supply, consistent lead times, and full traceability for production ramp-up.
Supply support for SN0304078DBVT 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 digital signal technologies, with over 90 years of innovation in power management and precision analog ICs.
The SN0304078DBVT belongs to TI's legacy charge-pump regulator family designed specifically for low-noise, inductorless power conversion in battery-powered portable electronics - emphasizing minimal external components, thermal robustness, and ease of integration.
FAQ
What is the output voltage accuracy of the SN0304078DBVT across temperature and load?
The SN0304078DBVT maintains an output voltage of 5.0 V with ±3% tolerance over the full operating temperature range (−40°C to +85°C) and load currents up to 30 mA. At 25°C and 10 mA load, typical output is exactly 5.0 V; worst-case deviation remains within 4.7–5.3 V per electrical characteristics table in SBAS284A.
Does the SN0304078DBVT require external feedback resistors to set output voltage?
No, the SN0304078DBVT is a fixed-output device with internally trimmed 5.0 V regulation - no external resistors or compensation components are needed. Its charge-pump topology and internal reference eliminate feedback loop design complexity, reducing BOM count and layout risk compared to adjustable DC/DC converters.
Can the SN0304078DBVT operate with input voltage lower than its 5 V output?
Yes, the SN0304078DBVT is designed to operate in boost mode and functions correctly even when VIN is below VOUT - for example, delivering regulated 5.0 V from a 2.7 V Li-ion cell. Its charge-pump architecture inherently supports input-to-output ratios less than unity without dropout or regulation loss.
What capacitor types and values are recommended for SN0304078DBVT?
Texas Instruments specifies X7R or X5R ceramic capacitors: 2.2 µF for CIN and COUT, and 0.22 µF for CPUMP, all rated ≥6.3 V. Leaded or tantalum capacitors are discouraged due to higher ESR and inductance, which increase output ripple beyond the specified 35 mVPP at 30 mA load.
How does thermal shutdown work in the SN0304078DBVT?
The SN0304078DBVT disables output when junction temperature reaches ~160°C and automatically resumes operation once temperature falls to ~140°C. This hysteresis prevents oscillation during thermal stress. The SOT23-6 package has θJA = 200°C/W, so continuous 30 mA operation at 5.5 V input requires adequate copper pour or airflow to avoid repeated cycling.
SN0304078DBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN0304078DBVT FAQ
1.How can I place an order for SN0304078DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN0304078DBVT 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 SN0304078DBVT reliable?
The price and inventory of SN0304078DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN0304078DBVT is usually 5 days.
3.What payment methods are accepted for SN0304078DBVT?
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SN0304078DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN0304078DBVT 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 SN0304078DBVT?
For technical support, including SN0304078DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN0304078DBVT requirements.
6.How does Aetrix verify that SN0304078DBVT is sourced from the original manufacturer or authorized distributors?
All SN0304078DBVT 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 SN0304078DBVT meets industry standards.
7.What is the process for return or replacement of SN0304078DBVT?
All SN0304078DBVT units undergo pre-shipment inspection (PSI). If there is an issue with SN0304078DBVT, 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 SN0304078DBVT part is unused and in its original packaging.
Return procedure for SN0304078DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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