LM3370SD-3021 Texas Instruments Integrated Circuit (Small Outline No-lead) In Stock
LM3370SD-3021 is a dual synchronous step-down DC-DC converter from Texas Instruments with dynamic voltage scaling, operating from a 2.7 V to 5.5 V input in a 16-pin SON package. It provides automatic PWM/PFM mode switching for high efficiency across load ranges. In stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline No-lead
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- LM3370SD-3021 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
What are the key features of LM3370SD-3021?
- Dual synchronous step-down converter with dynamic voltage scaling enabling real-time output voltage adjustment for processor core DVFS applications
- Automatic PWM/PFM mode switching maximizes efficiency from light load to full load across a 2.7 V to 5.5 V input range
- Compact 16-pin SON (no-lead) package with integrated FETs reducing external component count and PCB area in space-constrained mobile designs
What is LM3370SD-3021 used for?
LM3370SD-3021 is used in portable consumer electronics, smartphones, and tablets where dual power rails for application processors and memory must be efficiently generated from a single 3.6 V lithium-ion cell. The dynamic voltage scaling feature enables the host processor to reduce core voltage during light workloads, extending battery run time by 20 to 30 percent compared to fixed-output converters. Its automatic PWM/PFM mode maintains high efficiency even at load currents below 10 mA, making it suitable for standby power states in wireless devices.
What are the specifications of LM3370SD-3021?
| 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 | 1.242V |
| Output Voltage-Min | 1.158V |
| Output Voltage-Nom | 1.2V |
| 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 |
Where can I find the LM3370SD-3021 datasheet?
LM3370SD-3021 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM3370SD-3021?
Compatible alternatives and drop-in replacements for LM3370SD-3021:
Dual Switching Controller, Voltage-mode, 0.6A, 2400kHz Switching Freq-Max, PDSO16
Frequently Asked Questions
How does dynamic voltage scaling in LM3370SD-3021 reduce power consumption in mobile processors?
Dynamic voltage scaling allows the host processor to command the LM3370SD-3021 to lower its output voltage during low-performance operating modes, reducing core power proportional to VDD squared. For a processor dropping from 1.2 V to 0.9 V core voltage, power consumption decreases by approximately 44 percent, significantly extending battery life in smartphones and tablets running from a 3.6 V lithium-ion cell.
What input voltage range does LM3370SD-3021 support and which battery chemistries are compatible?
LM3370SD-3021 accepts input voltages from 2.7 V to 5.5 V, covering the full discharge curve of single-cell lithium-ion (2.7 V to 4.2 V) and lithium-polymer batteries. The 5.5 V maximum also accommodates USB 5 V VBUS power input, making LM3370SD-3021 suitable for dual-mode charging and battery-powered operation without additional input regulation.
How does the automatic PWM/PFM switching in LM3370SD-3021 maintain efficiency at light loads?
At load currents below a threshold of typically 30 to 50 mA, LM3370SD-3021 automatically switches from PWM to PFM (pulse-frequency modulation) mode, reducing switching losses and maintaining converter efficiency above 80 percent even at 1 mA loads. This prevents the efficiency collapse common in fixed-PWM converters during standby or sleep states in battery-powered IoT and mobile devices.
What package does LM3370SD-3021 use and how does it reduce PCB footprint?
LM3370SD-3021 comes in a 16-pin SON (small outline no-lead) package with an exposed thermal pad, measuring approximately 4 mm x 4 mm. The integrated synchronous FETs eliminate the need for external power transistors, and the no-lead package enables tight component spacing with 0.5 mm pitch pads, reducing the total power supply footprint to under 25 mm² including passive components.
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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.
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