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Texas Instruments LM3370TL-3006/NOPB
- Part No.:
- LM3370TL-3006/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 20-WFBGA
- Datasheet:
-
LM3370TL-3006/NOPB.pdf
- Description:
- IC REG BUCK 1.2V/1.8V DL 20DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
LM3370TL-3006/NOPB from Texas Instruments is a dual synchronous step-down DC-DC converter optimized for powering ultra-low-voltage circuits from a single Li-Ion battery or 2.7V–5.5V input rail. It delivers two regulated outputs-VOUT1 = 1.2 V and VOUT2 = 1.8 V-with 600 mA per channel, I²C-compatible dynamic voltage scaling, and 2 MHz fixed-frequency PWM operation. It is used in baseband and application processors requiring precise, low-noise, sequenced power delivery.
For engineers reviewing the LM3370TL-3006/NOPB datasheet, LM3370TL-3006/NOPB pinout, LM3370TL-3006/NOPB application, or LM3370TL-3006/NOPB equivalent, key selection considerations include its dual-buck architecture with out-of-phase switching, I²C-controlled voltage stepping (50 mV/100 mV), spread-spectrum noise reduction, and support for both auto PFM/PWM mode switching and forced PWM operation.
Technical Context
The LM3370TL-3006/NOPB implements voltage-mode control with input voltage feed-forward to ensure stable line regulation across 2.7V–5.5V input. Its dual buck regulators operate 180° out-of-phase to reduce input ripple current and suppress surge peaks at VIN.
Each channel integrates synchronous PFET/NFET switches with RDS(ON) of 350 mΩ (PFET) and 170 mΩ (NFET) in the DSBGA package, enabling high efficiency down to light loads via automatic PFM entry when output current drops below ~66 mA. The device supports LDO-like 100% duty-cycle operation for minimum dropout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | VOUT1 = 1.2 V, VOUT2 = 1.8 V - factory-trimmed fixed outputs; no external resistor network required. |
| Max Output Current | 600 mA per channel - supports demanding digital core/I/O rails without external current boosting. |
| Switching Frequency | 2.0 MHz (typ.) - enables use of compact 2.2 µH inductors and 4.7 µF/10 µF ceramic capacitors. |
| I²C Interface | 400 kHz max clock - allows real-time dynamic voltage scaling, mode control, and spread-spectrum enable/disable. |
| Input Voltage Range | 2.7 V to 5.5 V - compatible with single-cell Li-ion (2.7–4.2 V), 3-cell NiMH/NiCd, and fixed 3.3 V/5 V rails. |
| Thermal Resistance | θJA = 50 °C/W (DSBGA) - requires minimal PCB copper area for thermal management at full load. |
| Quiescent Current | 34 µA (PFM mode, both channels active) - extends battery life in always-on portable systems. |
Pinout & Package
The LM3370TL-3006/NOPB is packaged in a 20-bump DSBGA (3.0 mm × 2.0 mm × 0.6 mm), optimized for space-constrained portable applications. Pin assignments are defined per TI SNVS406N Rev. May 2013.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | SW1 | Buck 1 switch node - connects to 2.2 µH inductor; requires low-inductance layout to minimize EMI. |
| A2 | VIN1 | Input supply for Buck 1 - must be decoupled with 4.7 µF ceramic capacitor near pin. |
| A3 | SGND | Signal ground reference - isolated from power grounds to prevent noise coupling into feedback paths. |
| A4 | FB1 | Analog feedback for Buck 1 - senses VOUT1 at resistor divider; high-impedance input for precision regulation. |
| B1 | PGND1 | Buck 1 power ground - return path for high di/dt switch current; must connect to dedicated ground plane under IC. |
| B2 | PGND1_S | Buck 1 power ground sense - provides Kelvin sensing for improved load regulation accuracy. |
| B3 | SDA | I²C data line - open-drain, requires 2 kΩ pull-up to VDD; supports bidirectional communication for register access. |
| B4 | SCL | I²C clock line - open-drain, requires 2 kΩ pull-up; synchronizes all I²C transactions including voltage updates. |
| C1 | VDD | Signal supply - must be ≥ max(VIN1, VIN2); powers internal logic, POR, and I²C interface. |
| C2 | SGND | Signal ground - second SGND pin improves noise immunity in high-density layouts. |
| C3 | nPOR1 | Open-drain Power-On Reset for Buck 1 - asserts low when VOUT1 falls below 94% of target; requires 100 kΩ pull-up. |
| C4 | nPOR2 | Open-drain Power-On Reset for Buck 2 - asserts low when VOUT2 falls below 94% of target; independent timing. |
| D1 | PGND2 | Buck 2 power ground - separate return path prevents cross-regulator interference. |
| D2 | PGND2_S | Buck 2 power ground sense - Kelvin connection for accurate Buck 2 load regulation. |
| D3 | EN2 | Enable for Buck 2 - active-high logic; allows independent sequencing of VOUT2 relative to VOUT1. |
| D4 | EN1 | Enable for Buck 1 - active-high logic; supports staggered startup or fault-isolated shutdown. |
| E1 | SW2 | Buck 2 switch node - connects to second 2.2 µH inductor; 180° phase shift reduces input ripple. |
| E2 | VIN2 | Input supply for Buck 2 - independently routed to avoid shared impedance with VIN1. |
| E3 | SGND | Signal ground - third SGND pin enhances signal integrity for feedback and POR signals. |
| E4 | FB2 | Analog feedback for Buck 2 - senses VOUT2; identical electrical behavior to FB1 for matched regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Voltage Scaling via I²C | Enables runtime adjustment of VOUT1 (1.0–2.0 V in 50 mV steps) and VOUT2 (1.8–3.3 V in 100 mV steps) to match processor DVFS states. |
| Out-of-Phase Dual-Buck Operation | 180° phase shift between SW1 and SW2 reduces peak input current by ~30%, easing input capacitor sizing and EMI filtering. |
| Spread-Spectrum Modulation | I²C-enabled frequency dithering spreads switching energy over ±100 kHz bandwidth, lowering peak EMI by up to 10 dB. |
| Independent Power-On Reset Outputs | nPOR1/nPOR2 provide dedicated, open-drain reset signals for each rail - simplifies system-level power sequencing without external supervisors. |
| Internal Soft-Start | Gradually ramps output voltages during EN assertion to limit inrush current and prevent input rail collapse on cold start. |
Applications
| Baseband Processor Core Power | Application Processor I/O Supply |
|---|---|
Use Scenario: Powers ARM9/ARM11 baseband processor cores requiring tightly regulated 1.2 V at up to 600 mA with fast transient response. IC Role / Device Role / Timing Role: Dual-buck regulator providing primary core voltage (VOUT1) and auxiliary domain voltage (VOUT2), with I²C-synchronized DVFS transitions. Use Value: Enables 1.2 V → 1.0 V voltage scaling during idle states, reducing dynamic power by >30% while maintaining deterministic wake-up latency. | Use Scenario: Supplies 1.8 V I/O banks for multimedia application processors interfacing with LPDDR, camera sensors, and display controllers. IC Role / Device Role / Timing Role: Secondary regulated rail generator with independent enable (EN2) and POR (nPOR2) for safe I/O power-up after core stabilization. Use Value: Eliminates need for discrete level-shifters or external supervisors by delivering clean, sequenced 1.8 V with <50 ms POR delay. |
| FPGA Configuration Voltage | Portable Audio Codec Bias |
Use Scenario: Provides 1.2 V configuration voltage and 1.8 V I/O voltage for low-power FPGA families such as Xilinx Spartan-6 or Intel MAX 10. IC Role / Device Role / Timing Role: Dual-output power source supporting simultaneous configuration and I/O operation with independent enable control. Use Value: Reduces BOM count by replacing two discrete LDOs; out-of-phase switching minimizes FPGA supply noise-induced bit errors. | Use Scenario: Delivers low-noise 1.2 V and 1.8 V bias rails to stereo audio codecs (e.g., TI PCM300x) in Bluetooth headsets and wearables. IC Role / Device Role / Timing Role: Low-ripple DC-DC source with spread-spectrum enabled to meet Class D amplifier EMI limits. Use Value: Achieves <10 µVRMS output noise in forced PWM mode, preventing audible switching artifacts in analog audio paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-buck DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62400DRVR | Fixed 1.2 V / 1.8 V outputs; 3 MHz switching; no I²C interface; uses external resistors for feedback. | Lacks dynamic voltage scaling and spread-spectrum; simpler control but less flexible for DVFS systems. | Select when I²C control is unnecessary and higher switching frequency is preferred for smaller magnetics. |
| RT8059GQW | 1.2 V / 1.8 V outputs; 2.5 MHz; I²C-compatible; integrated soft-start and power-good, but no spread-spectrum. | Offers comparable sequencing and regulation, but lacks noise-reduction capability critical for RF-sensitive designs. | Choose for cost-sensitive consumer applications where EMI compliance is less stringent than in cellular handsets. |
Compared with TPS62400DRVR and RT8059GQW, the LM3370TL-3006/NOPB uniquely combines factory-trimmed dual outputs, I²C-based DVFS, and hardware-enforced spread-spectrum - making it optimal for space-constrained, battery-powered devices requiring both power efficiency and EMI robustness.
Availability
LM3370TL-3006/NOPB is available at Aetrix Electronics and suitable for portable computing, cellular baseband power, and wearable sensor hub applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM3370TL-3006/NOPB 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 power management technologies, with decades of expertise in high-efficiency DC-DC conversion.
The LM3370 product line was designed specifically for ultra-portable systems requiring dual, dynamically scalable, low-noise power rails from single-cell batteries - targeting baseband/application processors, FPGAs, and audio subsystems.
FAQ
What output voltages does the LM3370TL-3006/NOPB deliver?
The LM3370TL-3006/NOPB is factory-configured to deliver fixed VOUT1 = 1.2 V and VOUT2 = 1.8 V. These values are laser-trimmed during production and do not require external feedback resistors. The I²C interface allows runtime adjustment within wider ranges (1.0–2.0 V for VOUT1, 1.8–3.3 V for VOUT2), but the default 1.2 V / 1.8 V pairing is permanently set for this specific orderable variant.
Does the LM3370TL-3006/NOPB support independent enable and power-on-reset functions?
Yes, the LM3370TL-3006/NOPB provides fully independent control: EN1 and EN2 pins allow separate activation of each buck channel, and nPOR1/nPOR2 are open-drain outputs that assert low when their respective output falls below 94% of target. Each POR has a default 50 ms delay and can be pre-trimmed to 50 µs, 100 ms, or 200 ms - enabling precise, multi-rail power sequencing without external circuitry.
How does the LM3370TL-3006/NOPB reduce EMI in sensitive RF designs?
The LM3370TL-3006/NOPB reduces EMI through three hardware features: (1) 180° out-of-phase switching between Buck 1 and Buck 2 lowers input ripple current amplitude; (2) programmable spread-spectrum modulation dithers the 2 MHz switching frequency over ±100 kHz; and (3) forced PWM mode eliminates frequency variation inherent in PFM operation. All three are accessible and controllable via the I²C interface on the LM3370TL-3006/NOPB.
What package type and thermal performance does the LM3370TL-3006/NOPB use?
The LM3370TL-3006/NOPB uses a 20-bump DSBGA package (3.0 mm × 2.0 mm × 0.6 mm) with θJA = 50 °C/W on a standard 4-layer board. This compact footprint supports high-density portable layouts, and the thermal resistance enables full 600 mA/channel operation at ambient temperatures up to +85°C with appropriate PCB copper area - verified in TI's SNVS406N datasheet Figure 9 and Dissipation Rating Table.
Can the LM3370TL-3006/NOPB operate from a single Li-Ion cell?
Yes, the LM3370TL-3006/NOPB is explicitly designed for single Li-Ion battery operation, supporting input voltages from 2.7 V to 5.5 V. Its ability to operate in 100% duty-cycle mode ensures regulation down to VOUT + dropout (e.g., 1.2 V output remains stable even as cell voltage discharges to ~2.7 V), and its 34 µA quiescent current in PFM mode maximizes battery runtime in standby states.
LM3370TL-3006/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-WFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V, 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -30°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-DSBGA
LM3370TL-3006/NOPB FAQ
1.How can I place an order for LM3370TL-3006/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3370TL-3006/NOPB 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 LM3370TL-3006/NOPB reliable?
The price and inventory of LM3370TL-3006/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3370TL-3006/NOPB is usually 5 days.
3.What payment methods are accepted for LM3370TL-3006/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3370TL-3006/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3370TL-3006/NOPB?
LM3370TL-3006/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3370TL-3006/NOPB 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 LM3370TL-3006/NOPB?
For technical support, including LM3370TL-3006/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3370TL-3006/NOPB requirements.
6.How does Aetrix verify that LM3370TL-3006/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3370TL-3006/NOPB 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 LM3370TL-3006/NOPB meets industry standards.
7.What is the process for return or replacement of LM3370TL-3006/NOPB?
All LM3370TL-3006/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3370TL-3006/NOPB, 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 LM3370TL-3006/NOPB part is unused and in its original packaging.
Return procedure for LM3370TL-3006/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3370TL-3006/NOPB Tags
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