My Inquiry
My Account
Texas Instruments LM3310SQX/NOPB
- Part No.:
- LM3310SQX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LM3310SQX/NOPB.pdf
- Description:
- IC REG BOOST ADJ 2A 24WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,873
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM3310SQX/NOPB from Texas Instruments is a step-up PWM DC/DC converter with integrated operational amplifier and gate pulse modulation (GPM) switch, designed for TFT-LCD bias supply generation. It delivers up to 2 A output current with 0.18 Ω internal switch RDSON, supports adjustable boost output up to 20 V, operates from 2.5 V to 7 V input, and features pin-selectable 660 kHz / 1.28 MHz switching frequency.
For engineers reviewing the LM3310SQX/NOPB datasheet, LM3310SQX/NOPB pinout, LM3310SQX/NOPB application, or LM3310SQX/NOPB equivalent, key selection considerations include GPM timing control (VFLK/VDPM), dual-domain op-amp sourcing/sinking capability (±135 mA), soft-start programmability via SS pin, input undervoltage protection thresholds (2.4 V ON / 2.1 V OFF), and thermal shutdown at 145 °C with 20 °C hysteresis.
Technical Context
The LM3310SQX/NOPB integrates three functional blocks: a current-mode PWM boost regulator with internal 2 A NMOS switch, a rail-to-rail op-amp with AVIN supply (4–14 V) and ±135 mA drive capability, and a gate pulse modulation circuit supporting VGH input (5–30 V) and generating VGHM output for TFT gate driver timing control. The GPM block responds to VFLK (LCD on/off signal) and VDPM (enable) inputs, with internal PMOS/NMOS switching controlled by VGH voltage level.
Switching operation uses fixed-frequency current-mode control with selectable 660 kHz or 1.28 MHz via FREQ pin, maximum duty cycle of 91% at 660 kHz, and soft-start initiated by ISS current charging external CSS capacitor. Feedback regulation targets 1.263 V at FB pin, and error amplifier compensation is applied at VC pin with transconductance of 26–133 µmho.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Boost Output Voltage | Adjustable up to 20 V via resistor divider on FB pin; regulated to 1.263 V reference ensures stable output across line/load variations. |
| Switch Current Limit | 2.0–2.6 A typical; enables reliable inductor sizing for 2 A continuous load while limiting peak stress during startup or overload. |
| Internal Switch RDSON | 0.18 Ω typical at 500 mA; minimizes conduction loss and improves efficiency in portable TFT bias applications. |
| Op-Amp Output Current | Sources 90–195 mA / sinks 105–175 mA; sufficient to drive high-capacitance TFT panel bias lines without external buffers. |
| Switching Frequency | Selectable 660 kHz or 1.28 MHz via FREQ pin; higher frequency allows smaller L/C components; lower frequency improves light-load efficiency. |
| Input Voltage Range | 2.5 V to 7 V; compatible with single-cell Li-ion (3.0–4.2 V), dual-cell alkaline (2.4–3.2 V), and regulated 3.3/5 V rails. |
| Thermal Shutdown | Activates at 145 °C junction temperature with ~20 °C hysteresis; protects device during sustained overloads or poor PCB thermal design. |
Pinout & Package
LM3310SQX/NOPB is housed in a thermally enhanced 24-lead WQFN package (RTW0024A), with exposed die attach pad (DAP) internally connected to ground and requiring direct connection to AGND and PGND planes for optimal thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Boost converter and GPM power input | Primary supply for switching regulator and GPM block; must be decoupled near pin with low-ESR ceramic capacitor. |
| SW | Boost power switch node | Connects internal NMOS drain to external inductor; high dv/dt node requiring short, low-inductance routing to PGND. |
| FB | Output voltage feedback input | Monitors divided output voltage; 1.263 V reference sets regulation point; high-impedance input (27–160 nA bias). |
| SS | Soft-start timing control | ISS = 8.5–13.5 µA current source charges external CSS; TSS ≈ CSS × 1.24 V / ISS determines ramp time. |
| SHDN | Active-low enable control | Pulling below 0.4 V disables all blocks; threshold is 1.4 V (typical) for rising edge; supports system-level power sequencing. |
| AVIN | Op-amp analog supply | 4–14 V dedicated rail; bypass directly to AGND with ceramic cap; RC filter (5–20 Ω + cap) recommended if sourced from boost output. |
| POS/NEG/OUT | Op-amp differential input/output | Supports unity-gain buffer or gain configurations; output swings rail-to-rail; requires external compensation for stability with low-C loads. |
| VGH/VGHM/VDPM/VFLK | GPM control and output terminals | VGH (5–30 V) powers GPM; VGHM is modulated output; VDPM enables GPM; VFLK controls LCD on/off timing sequence. |
| AGND/PGND | Analog and power ground | Must be connected directly to DAP; AGND handles analog circuits; PGND carries switch return current; star-point connection critical. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated gate pulse modulation (GPM) | Generates timing-controlled VGHM output synchronized to VFLK/VDPM signals-eliminates need for discrete timing logic in TFT bias supplies. |
| 2 A, 0.18 Ω internal NMOS switch | Reduces external component count and board area; enables compact 2 A boost designs without external MOSFET or driver. |
| Pin-selectable 660 kHz / 1.28 MHz switching | Allows trade-off between component size (higher fSW) and efficiency (lower fSW), without changing layout or BOM. |
| Rail-to-rail op-amp with ±135 mA drive | Directly drives high-capacitance TFT panel lines (e.g., VCOM, gamma buffers); avoids secondary amplifiers and associated noise/latency. |
| Programmable soft-start via SS pin | External capacitor sets inrush current limit during startup-prevents input rail collapse and reduces stress on input capacitors and inductor. |
| Input undervoltage lockout (UVP) | Prevents erratic operation during brown-out: switches off below 2.1 V (OFF threshold) and only resumes above 2.4 V (ON threshold). |
Applications
| TFT-LCD Panel Bias Supply | Portable Display Power Management |
|---|---|
Use Scenario: Generating positive high-voltage bias (VGH) and negative bias (VGL) for active-matrix TFT-LCD panels in handheld devices. IC Role / Device Role / Timing Role: LM3310SQX/NOPB serves as primary boost converter for VGH, while its integrated GPM block modulates VGHM timing in sync with display controller's VFLK signal. Use Value: Eliminates discrete charge pumps and timing ICs; reduces solution size by >30% and simplifies layout with single-chip VGH generation and modulation. |
Use Scenario: Powering multiple analog bias rails (VCOM, gamma, AVDD) in battery-powered medical monitors and industrial HMIs. IC Role / Device Role / Timing Role: LM3310SQX/NOPB provides regulated boost output for analog subsystems, while its rail-to-rail op-amp buffers and conditions reference voltages. Use Value: Single-package integration of boost + op-amp + GPM reduces bill-of-materials and improves reliability versus multi-chip alternatives. |
| Automotive Infotainment Displays | Industrial Touchscreen Controllers |
Use Scenario: Supplying stable, sequenced bias voltages for automotive-grade TFT displays operating across −40 °C to +125 °C ambient. IC Role / Device Role / Timing Role: LM3310SQX/NOPB delivers robust boost conversion with thermal shutdown (145 °C) and UVP, while GPM ensures precise VGH timing under EMI-prone vehicle environments. Use Value: Qualified for extended temperature range; built-in protections reduce need for external supervision circuitry in ASIL-B–compatible designs. |
Use Scenario: Driving high-resolution resistive/capacitive touch overlay bias and sensing circuits in factory automation panels. IC Role / Device Role / Timing Role: LM3310SQX/NOPB's op-amp sources/sinks >135 mA to drive touch controller reference buffers, while boost section powers auxiliary analog rails. Use Value: High-output-current op-amp eliminates external drivers; integrated soft-start prevents touch controller reset during power-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC/DC converter with integrated analog functions applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher 2.5 A switch current, no integrated op-amp or GPM; 2.7–12 V input; 600 kHz–2.2 MHz adjustable fSW. | Requires external op-amp and timing logic for TFT bias; better suited for general-purpose boost where analog integration is not needed. | Select when higher output current (>2 A) or wider input range is required, and GPM/timing functionality is implemented externally. |
| LM3429MMX/NOPB | LED driver controller (current-mode), no boost converter or op-amp; supports external MOSFET; 4.5–42 V input. | Designed for constant-current LED strings-not suitable for voltage-regulated TFT bias or analog signal conditioning. | Not a functional substitute; only consider if redesigning for LED backlight instead of panel bias generation. |
Compared with TPS61088RHLR and LM3429MMX/NOPB, the LM3310SQX/NOPB uniquely combines boost conversion, rail-to-rail op-amp, and GPM timing in one WQFN package-making it the only single-chip solution for space-constrained TFT-LCD bias with synchronized gate pulse control.
Availability
LM3310SQX/NOPB is available at Aetrix Electronics and suitable for TFT-LCD bias supplies, portable display power management, and industrial touchscreen controllers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM3310SQX/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 consumer markets since 1930.
The LM3310SQX/NOPB belongs to TI's display power management product line, engineered specifically to integrate boost conversion, analog buffering, and LCD timing control into a single IC for next-generation compact, low-noise TFT-LCD bias architectures.
FAQ
What is the maximum output voltage achievable with LM3310SQX/NOPB?
The LM3310SQX/NOPB supports an adjustable boost output voltage up to 20 V, set by a resistor divider on the FB pin referencing the internal 1.263 V feedback voltage. This allows precise configuration for TFT-LCD VGH requirements while maintaining regulation accuracy of ±2.5% over temperature and line variations.
How does the GPM function operate in LM3310SQX/NOPB?
The GPM block in LM3310SQX/NOPB generates a modulated VGHM output using VGH (5–30 V supply) and timing inputs VFLK (LCD on/off) and VDPM (GPM enable). When VDPM is high, VGHM follows VFLK transitions; when VDPM is low, VGHM discharges through an internal 1 kΩ resistor-enabling precise synchronization of gate driver timing without external logic.
Can the op-amp in LM3310SQX/NOPB drive capacitive loads without oscillation?
Yes-the LM3310SQX/NOPB op-amp remains stable driving capacitive loads ≥50 Ω in series with 4.7 nF (typical TFT-LCD panel impedance). For lighter loads, external compensation (e.g., 50 Ω + 4.7 nF to AGND) is required to maintain phase margin and prevent oscillation, as confirmed in the datasheet's stability guidelines.
What is the purpose of the SS pin on LM3310SQX/NOPB?
The SS pin on LM3310SQX/NOPB controls soft-start duration via an external capacitor (CSS). An internal 8.5–13.5 µA current source charges CSS until reaching ~1.24 V, linearly ramping the FB reference to limit inrush current. TSS ≈ CSS × 1.24 V / ISS enables precise startup timing without additional circuitry.
Does LM3310SQX/NOPB include protection against input undervoltage conditions?
Yes-LM3310SQX/NOPB incorporates input undervoltage protection (UVP) with distinct ON (2.4 V) and OFF (2.1 V) thresholds. During startup, it prevents switching until VIN exceeds 2.4 V; during operation, it disables all blocks if VIN drops below 2.1 V, then re-enables only after VIN rises above 2.4 V-ensuring clean, glitch-free power sequencing.
LM3310SQX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 7V
- Voltage - Output (Min/Fixed):
- 1.263V
- Voltage - Output (Max):
- 20V
- Current - Output:
- 2A (Switch)
- Frequency - Switching:
- 660kHz, 1.28MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-WQFN (4x4)
LM3310SQX/NOPB FAQ
1.How can I place an order for LM3310SQX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3310SQX/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 LM3310SQX/NOPB reliable?
The price and inventory of LM3310SQX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3310SQX/NOPB is usually 5 days.
3.What payment methods are accepted for LM3310SQX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3310SQX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3310SQX/NOPB?
LM3310SQX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3310SQX/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 LM3310SQX/NOPB?
For technical support, including LM3310SQX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3310SQX/NOPB requirements.
6.How does Aetrix verify that LM3310SQX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3310SQX/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 LM3310SQX/NOPB meets industry standards.
7.What is the process for return or replacement of LM3310SQX/NOPB?
All LM3310SQX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3310SQX/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 LM3310SQX/NOPB part is unused and in its original packaging.
Return procedure for LM3310SQX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3310SQX/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…
