LM3370SD-4221 Texas Instruments Integrated Circuit (Small Outline No-lead) In Stock
LM3370SD-4221 is a dual switching voltage regulator controller from Texas Instruments. It features automatic PWM/PFM mode, voltage-mode control with pulse width modulation, and supports 2.7V to 5.5V input range. Ideal for portable and battery-powered applications requiring efficient power management.
- Manufacturer
- Texas Instruments
- Package
- Small Outline No-lead
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- LM3370SD-4221 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -30.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Dual switching controller with automatic PWM/PFM mode for optimized efficiency across load ranges
- Wide input voltage range: 2.7V to 5.5V, suitable for single-cell Li-ion and multi-cell battery systems
- Voltage-mode control with pulse width modulation for stable and precise output regulation
- Available in compact 16-pin Small Outline No-lead (SON) package for space-constrained designs
- Also available in 3.3V output version for flexible system power rail configurations
Applications
The LM3370SD-4221 is well-suited for portable consumer electronics such as smartphones, tablets, and wearables that require efficient dual-rail power conversion from Li-ion batteries. It is also used in handheld industrial instruments and wireless sensor nodes where compact form factor and automatic PWM/PFM switching are critical for extending battery life.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | AUTOMATIC PWM/PFM MODE AVAILABLE; ALSO 3.3 VOLT OUTPUT AVAILABLE |
| Analog IC - Other Type | DUAL SWITCHING CONTROLLER |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 2.7V |
| Input Voltage-Nom | 3.6V |
| JESD-30 Code | R-PDSO-N16 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Current-Max | 1.4A |
| Output Voltage-Max | 1.863V |
| Output Voltage-Min | 1.737V |
| Output Voltage-Nom | 1.8V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOLCC16,.16,20 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | PHASE-SHIFT |
| Switching Frequency-Max | 2400kHz |
| Temperature Grade | OTHER |
| Terminal Finish | TIN |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Package | Small Outline No-lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the input voltage range of the LM3370SD-4221?
The LM3370SD-4221 operates over an input voltage range of 2.7V to 5.5V, with a nominal input of 3.6V. This makes it compatible with single-cell Li-ion and Li-polymer battery systems commonly used in portable devices.
What control mode does the LM3370SD-4221 use?
The LM3370SD-4221 uses voltage-mode control with pulse width modulation (PWM). It also features automatic PWM/PFM mode switching, allowing the device to transition to pulse frequency modulation at light loads for improved efficiency.
What package type is the LM3370SD-4221 available in?
The LM3370SD-4221 is available in a 16-pin Small Outline No-lead (SON) package, which provides a compact footprint suitable for space-constrained PCB designs in portable and handheld applications.
What are typical applications for the LM3370SD-4221?
Typical applications include portable consumer electronics, smartphones, tablets, wearables, and handheld industrial instruments. The dual switching controller architecture and wide input range make it ideal for battery-powered systems requiring multiple regulated voltage rails.
Related Guides
TPS61291DRVR Selection Guide: Low-Quiescent-Current Boost Converters for IoT and Wearables
How to select the TPS61291DRVR and low-Iq boost converters for IoT, wearables, and coin-cell designs. Compares specs, packages, and alternatives from TI, ADI, and Microchip.
May 13, 2026
TMS5704357BZWTQQ1 Selection Guide: Choosing the Right TMS570 Automotive MCU Variant
Compare TMS570 automotive MCU variants by ASIL level, flash, package, and peripherals. Find the right fit from entry-level LQFP to the ASIL-D TMS5704357BZWTQQ1.
May 13, 2026
TI Hercules TMS5704357BZWTQQ1 Design Guide for Automotive ASIL-D and Industrial Functional Safety
Complete integration guide for the TI Hercules TMS5704357BZWTQQ1 dual-core lockstep Cortex-R5F MCU: lockstep CPU, ECC RAM, FlexRay/CAN-FD, and ASIL-D pitfalls.
May 12, 2026
PTN78000WAH Selection Guide: Choosing the Right 1.5 A 36 V Step-Down Power Module
Compare PTN78000WAH against PTN78000WAS, PTN78060WAH, and other 1.5A 36V step-down modules. Covers package, current rating, efficiency, and drop-in replaceability.
May 12, 2026
Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”