My Inquiry
My Account
Texas Instruments LM3203TLX/NOPB
- Part No.:
- LM3203TLX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFBGA
- Datasheet:
-
LM3203TLX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 500MA 10DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,152
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM3203TLX/NOPB from Texas Instruments is a synchronous step-down DC-DC converter with integrated bypass FET, optimized for RF power amplifier supply in CDMA/WCDMA mobile handsets. It operates from 2.7V–5.5V input, delivers adjustable 0.8V–3.6V output up to 500mA, and features 2MHz PWM switching, 85mΩ bypass FET, and fast 50µs enable turn-on - enabling dynamic PA voltage scaling to extend battery life.
For engineers reviewing the LM3203TLX/NOPB datasheet, LM3203TLX/NOPB pinout, LM3203TLX/NOPB application, or LM3203TLX/NOPB equivalent, key selection criteria include bypass-mode dropout performance, VCON-controlled analog voltage programming, 10-pin DSBGA package layout constraints, and 3-mode operation (PWM/Bypass/Shutdown) for RF PA power management.
Technical Context
The LM3203TLX/NOPB implements current-mode PWM control with internal slope compensation and synchronous rectification using an integrated N-FET. Its feedback loop is dynamically controlled via the analog VCON pin, which linearly sets FB reference voltage from 0.267V to 1.20V, enabling precise output voltage adjustment without external resistor changes.
It supports three distinct operational modes: fixed-frequency 2MHz PWM for regulated efficiency, forced bypass mode (via BYP pin) for minimal dropout using the 85mΩ internal P-FET, and shutdown mode (<0.1µA quiescent current) activated by EN pin. Over-voltage protection triggers at +100mV above VCON-set reference, and thermal shutdown engages at ~150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - compatible with single Li-ion cell operation across full discharge curve. |
| Output Voltage Range | 0.8V to 3.6V - programmable via VCON analog input and external resistor divider. |
| Max Load Current | 500mA in both PWM and Bypass modes - sufficient for mid-power RF PAs in WCDMA/CDMA handsets. |
| Switching Frequency | 2MHz typical - enables use of small 3.3µH inductors and compact ceramic output capacitors. |
| Bypass FET RDS(ON) | 85mΩ typical - reduces dropout voltage vs. PWM path, preserving PA output power at low battery. |
| Enable Turn-On Time | 50µs typical - ensures rapid response to baseband controller PA power-up commands. |
| Shutdown Current | 0.1µA typical - minimizes battery drain during idle or sleep states in mobile devices. |
Pinout & Package
LM3203TLX/NOPB uses a 10-pin, 1.5mm × 1.5mm, 0.4mm pitch lead-free DSBGA (YPA0010NHA) package optimized for space-constrained mobile phone PCBs. Thermal performance is rated at θJA = 100°C/W on a 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Analog supply input | Requires 0.1µF ceramic capacitor close to pin; powers internal bias and control circuitry. |
| VCON | Analog voltage control input | Directly programs FB reference (0.267V–1.20V); sets output voltage per VOUT = ((R1+R2)/R2) × VCON. |
| FB | Feedback input | Compares divided output voltage against VCON-derived reference; closed-loop regulation node. |
| BYP | Digital bypass mode control | High (>1.2V) enables bypass FET; low (<0.4V) forces PWM operation. |
| EN | Enable input | High (>1.2V) enables device; low (<0.4V) enters 0.1µA shutdown - must be held low until VIN >2.7V. |
| PGND | Power ground | Return path for high-current SW and bypass FET; separate from SGND to minimize noise coupling. |
| SW | Switching node | Connects to inductor; carries pulsed current up to 940mA peak in PWM mode. |
| PVIN | Power input to PFET & bypass FET | Must be tied to same net as VIN; decoupled with 10µF ceramic capacitor near pin. |
| BYPOUT | Bypass FET drain | Connects directly to output capacitor; tie to VDD only if bypass mode unused. |
| SGND | Analog/control ground | Reference for VDD, VCON, FB, EN, BYP; must be connected to PGND at single point near device. |
Key Features
| Feature | Design Value |
|---|---|
| Three selectable operating modes | PWM (regulated efficiency), Bypass (low-dropout direct battery feed), Shutdown (0.1µA IQ) - digitally controlled via EN/BYP pins for system-level PA power sequencing. |
| VCON-programmable output | Linear 0.267V–1.20V analog input maps to 0.8V–3.6V output - enables real-time PA supply voltage scaling to match transmit power requirements. |
| Integrated bypass FET | 85mΩ typical RDS(ON) - reduces conduction loss vs. PWM path, maintaining higher PA supply voltage under low-battery conditions. |
| Current-mode PWM with slope compensation | Stable operation across wide VIN/VOUT/load ranges; cycle-by-cycle current limit (940mA max) prevents inductor saturation and thermal runaway. |
| Over-voltage protection | 100mV OVP threshold above VCON reference - prevents output overshoot during light-load transients or startup without external components. |
Applications
| Cellular Handset RF Power Amplifier | WCDMA Baseband-Driven PA Supply |
|---|---|
Use Scenario: Dynamic supply voltage control for RF power amplifier in 3G mobile handset during varying signal strength and data transmission loads. IC Role / Device Role / Timing Role: Step-down DC-DC converter with bypass FET; regulates PA supply in PWM mode and switches to low-dropout bypass mode during peak transmit bursts. Use Value: Extends battery life by reducing PA supply voltage when full output power is unnecessary, while preserving peak PA performance via bypass mode. | Use Scenario: Baseband processor-driven adaptive PA biasing in WCDMA handsets using DAC-generated VCON voltage. IC Role / Device Role / Timing Role: Analog-programmable buck regulator; VCON pin accepts 0.267V–1.20V DAC output to set PA supply from 0.8V–3.6V in real time. Use Value: Enables 3GPP-compliant PA efficiency optimization across diverse RF link conditions without firmware or hardware changes. |
| CDMA Mobile Transmitter Stage | Battery-Powered RF Front-End Module |
Use Scenario: Compact, high-efficiency power delivery to CDMA PA stages in slim-profile smartphones with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Synchronous buck converter with 2MHz switching and integrated bypass FET; occupies minimal PCB area in 10-pin DSBGA package. Use Value: Achieves >96% efficiency at 150mA/3.2V out from 3.6V in, while enabling <50µs PA power-up timing for fast call setup. | Use Scenario: Power management for integrated RF front-end modules requiring low-noise, fast-response PA supply with minimal external components. IC Role / Device Role / Timing Role: Single-chip solution combining PWM regulation, bypass switching, and protection functions - eliminates need for discrete FETs and external OVP circuitry. Use Value: Reduces bill-of-materials and layout complexity while meeting stringent EMI requirements via fixed 2MHz frequency and clean shutdown behavior. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF power amplifier supply applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 3MHz fixed-frequency buck; no integrated bypass FET; requires external switch for low-dropout operation. | Lacks native bypass mode - needs additional MOSFET and control logic to replicate LM3203TLX/NOPB's seamless PWM-to-bypass transition. | Choose when higher switching frequency and smaller inductors are prioritized over integrated bypass functionality. |
| MAX8640YETA+ | 2.25MHz buck with I2C interface; programmable VOUT via digital command; no analog VCON pin. | Replaces analog voltage scaling with digital register writes - requires microcontroller I2C support and firmware integration. | Prefer when system already uses I2C bus and requires multiple configurable output rails beyond PA supply. |
Compared with TPS62231DRVR and MAX8640YETA+, the LM3203TLX/NOPB uniquely integrates analog VCON-based voltage scaling and a dedicated bypass FET in a single 10-pin DSBGA package - simplifying design for cost-sensitive, space-constrained CDMA/WCDMA handset PA supplies where analog baseband control is standard.
Availability
LM3203TLX/NOPB is available at Aetrix Electronics and suitable for cellular handset design, WCDMA RF front-end development, and battery-powered portable radio applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production lots.
Supply support for LM3203TLX/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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LM3203TLX/NOPB belongs to TI's RF power management product line, designed specifically to address dynamic voltage scaling and low-dropout supply requirements of cellular RF power amplifiers in space- and efficiency-critical mobile platforms.
FAQ
What is the primary function of the VCON pin on the LM3203TLX/NOPB?
The VCON pin on the LM3203TLX/NOPB is an analog input that directly controls the feedback reference voltage, ranging from 0.267V to 1.20V. This allows linear programming of the output voltage from 0.8V to 3.6V using the formula VOUT = ((R1+R2)/R2) × VCON. In LM3203TLX/NOPB applications, it enables real-time PA supply voltage adjustment by a baseband DAC, optimizing RF efficiency across varying transmit power levels without changing external resistors.
How does the LM3203TLX/NOPB handle transitions between PWM and Bypass modes?
The LM3203TLX/NOPB manages mode transitions via the BYP pin: high (>1.2V) activates bypass mode, low (<0.4V) forces PWM mode. Transition times are 31µs (PWM→Bypass) and 15µs (Bypass→PWM), minimizing output voltage undershoot or overshoot. During transition, both paths remain active briefly to maintain continuous PA supply - a critical feature for uninterrupted RF transmission in LM3203TLX/NOPB-based handset designs.
What is the recommended PCB layout practice for the BYPOUT pin of the LM3203TLX/NOPB?
For optimal performance, the BYPOUT pin of the LM3203TLX/NOPB must be connected directly to the output capacitor with a dedicated, low-inductance trace - not shared with the FB node or other signals. If bypass mode is unused, BYPOUT should be tied to VDD. Leaving BYPOUT floating is prohibited, as it may cause erratic bypass FET behavior or increased EMI in LM3203TLX/NOPB implementations.
Does the LM3203TLX/NOPB include over-voltage protection, and how does it operate?
Yes, the LM3203TLX/NOPB includes over-voltage protection (OVP) that triggers when the FB voltage exceeds the VCON reference by 100mV (typ.). Upon detection, the PWM PFET and NFET synchronous rectifier are turned off to skip pulses until FB returns within tolerance. This protects downstream RF components from damage during light-load transients or startup surges - a built-in safeguard that eliminates the need for external OVP circuitry in LM3203TLX/NOPB designs.
What thermal protection mechanism does the LM3203TLX/NOPB implement, and at what junction temperature does it activate?
The LM3203TLX/NOPB incorporates thermal overload protection that disables all switching elements - PFET, NFET, and bypass FET - when junction temperature reaches approximately 150°C. Operation resumes automatically once temperature falls below ~130°C. This hysteresis prevents thermal cycling and protects the device during sustained overload or poor heatsinking conditions, ensuring robust reliability in thermally dense LM3203TLX/NOPB handset layouts.
LM3203TLX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 3.6V
- Current - Output:
- 500mA
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -30°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DSBGA
LM3203TLX/NOPB FAQ
1.How can I place an order for LM3203TLX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3203TLX/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 LM3203TLX/NOPB reliable?
The price and inventory of LM3203TLX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3203TLX/NOPB is usually 5 days.
3.What payment methods are accepted for LM3203TLX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3203TLX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3203TLX/NOPB?
LM3203TLX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3203TLX/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 LM3203TLX/NOPB?
For technical support, including LM3203TLX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3203TLX/NOPB requirements.
6.How does Aetrix verify that LM3203TLX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3203TLX/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 LM3203TLX/NOPB meets industry standards.
7.What is the process for return or replacement of LM3203TLX/NOPB?
All LM3203TLX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3203TLX/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 LM3203TLX/NOPB part is unused and in its original packaging.
Return procedure for LM3203TLX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3203TLX/NOPB Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
