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LT1944-1EMS#TRPBF
LT1944-1EMS#TRPBF
| Part Number | LT1944-1EMS#TRPBF |
|---|---|
| Manufacturer | Analog Devices (Linear Technology) |
| Category | Integrated Circuits (ICs) > PMIC – Voltage Regulators – DC DC Switching Regulators |
| Description | Dual Micropower Step-Up DC/DC Converter, 1.2V to 15V Input, Dual 34V Switches, MSOP-10 Package, Tape & Reel. |
| Stock Status | In Stock |
| Origin | Original Factory |
Product Overview
The LT1944-1EMS#TRPBF is a dual micropower boost DC/DC regulator from Analog Devices (Linear Technology). Adopting constant off-time control, it integrates dual 34V power switches with 130mA per channel limit. Supporting 1.2V–15V input, it fits single/double alkaline, NiMH and single Li-ion batteries. Its 20µA active quiescent current and sub-1µA shutdown current extend battery life. Packaged in compact 10-lead MSOP, it needs minimal external components for dual-output portable power systems like handheld devices and display bias supplies.
Core Advantages
Dual Independent Output Channels
Two isolated boost regulators in one MSOP-10 chip to generate two low-noise positive voltage rails simultaneously.
Ultra Low Quiescent Current
20µA operating current per channel, greatly prolonging standby battery life for low-power always-on equipment.
34V High-Voltage Power Switches
Built-in high withstand voltage switches, capable of outputting high voltage for LCD and OLED bias circuits directly from low input power.
Independent Shutdown Control
Separate shutdown pin for each channel; supply current drops below 1µA when disabled to eliminate idle power consumption.
Key Specifications
| Brand | Analog Devices / Linear Technology |
|---|---|
| RoHS Status | RoHS Compliant / Lead-Free |
| EDA/CAD Model | PCB footprints, schematic symbols, and LTspice simulation models are available on request |
| Warranty | 1-Year Standard Quality Warranty |
| Function Type | Step-Up Boost DC-DC Regulator |
| Package / Case | 10-MSOP (3.00mm × 3.00mm × 0.50mm) |
| Mounting Type | Surface Mount |
| Surface Marking / Silkscreen | LTTU Marking |
| Output Type | Adjustable (via feedback resistor dividers) |
| Output Voltage Range | 1.23V ~ 34V |
| Number of Outputs | 2 (Dual independent channels) |
| Input Voltage Range | 1.2V to 15V |
| Maximum Output Voltage | Up to 34V (limited by internal switch rating) |
| Internal Switch Current Limit | 130mA (per channel) |
| Quiescent Current (IQ) | 20µA per channel (Active), less than 1µA (Shutdown) |
| Feedback Voltage Reference | 1.2V (typical) |
| Operating Temperature Range | 0°C to +70°C @ TA (Commercial-grade qualification) |
Typical Applications
- OLED displays and LCD bias supplies in portable handheld instruments
- TFT-LCD panel bias generators for consumer and industrial monitors
- Handheld medical diagnostics and ultra-low-power battery-operated meters
- Local step-up DC/DC conversion in RF transceivers and wireless sensor nodes
- Dual-rail analog bias supplies requiring high efficiency at extremely light loads
Order & Shipping Info
| Minimum Order Quantity (MOQ) | 1 Piece |
|---|---|
| Shipping Time | Shipped within 1-2 business days |
| Delivery Time | 3-7 working days worldwide |
| Shipping Methods | DHL, UPS, FedEx, EMS |
| Payment Methods | T/T (Bank Transfer), PayPal, Credit Card, Western Union |
Technical Support
For datasheet, sample requests, stock check, or bulk pricing, please use the Quick Inquiry form. We will reply within 24 hours.
Frequently Asked Questions
Q1: What does #TRPBF suffix mean for LT1944-1EMS#TRPBF?
A1: TR = Tape & Reel packaging, PBF = lead-free RoHS compliant, suitable for SMT automated production.
Q2: What is the difference between LT1944 and LT1944-1?
A2: Internal switch current limit differs: LT1944 is 350mA/channel, LT1944-1 is 130mA/channel for low-power mini designs.
Q3: Can LT1944-1 generate negative output voltage?
A3: Yes. Add external charge pump diode-capacitor circuit to get negative rail for LCD contrast bias.
Q4: Why constant off-time architecture fits battery-powered devices?
A4: Switching frequency drops under light loads to cut power loss, maintaining high efficiency across all load ranges.
Q5: What is the operating temperature range of LT1944-1EMS?
A5: Commercial grade 0°C ~ +70°C, not applicable for industrial high-low temp scenarios.
Q6: Is LT1944-1 in stock? What’s the MOQ?
A6: Original factory stock available; small sample orders and bulk reel orders are both supported.
Q7: Can I get LTspice simulation model for this chip?
A7: Yes, send inquiry to apply for official simulation model, PCB footprint and schematic library.
Q8: What batteries match the 1.2V~15V input range?
A8: Single/double alkaline/NiMH batteries and single-cell Li-ion batteries are fully compatible.
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