LMR64010XMFX - 1A, 14V Step-Up DC-DC Converter | Texas Instruments
N.º de pieza: LMR64010XMFX/ ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.62 | $1,62 |
| 10 | $1.45 | $14,50 |
| 100 | $1.18 | $118,00 |
| 500 | $0.92 | $460,00 |
| 1.000 | $0.74 | $740,00 |
| 3.000 | $0.58 | $1.740,00 |
LMR64010XMFX/ Descripción general
A boost (step-up) DC-DC converter is a type of switched-mode power supply (SMPS) that uses an inductor, a power switch, a diode, and an output capacitor to step a lower DC input voltage up to a higher DC output voltage. The boost topology belongs to the SMPS family, which itself falls under the broader category of power management ICs (PMICs). By using pulse-width modulation (PWM) and energy storage in a magnetic field, a boost converter achieves far higher efficiency (>80% typical) than a linear regulator when VIN is significantly below VOUT, eliminating the need for bulky heatsinking.
Key features of the LMR64010 include 1.6 MHz fixed-frequency PWM operation (allowing the use of small chip inductors and ceramic capacitors), a 40V internal DMOS switch rated for 1A peak, less than 1 µA shutdown quiescent current for battery-saving standby, and cycle-by-cycle current limiting. Internal compensation simplifies the external BOM to just an inductor, a Schottky diode, input/output capacitors, and two feedback resistors, all of which fit into roughly 25 mm² of PCB area.
The LMR64010 employs current-mode control with a 1.6 MHz oscillator and an integrated 40V DMOS power switch. The high switching frequency pushes the converter's fundamental ripple and its harmonics above the AM broadcast band, simplifying EMI filtering and enabling compliance with FCC and CISPR radiated and conducted limits. Current-mode control also provides inherent cycle-by-cycle current limiting and simplified loop compensation.
Typical applications include bias supplies for TFT LCD panels (10V to 20V rails from 3.3V/5V system rails), LED drivers for indicator and signage lighting, low-power 12V to 36V industrial sensors, battery-powered portable equipment stepping 1S Li-ion up to USB-OTG or 5V/12V rails, and white-LED flash and backlight circuits in handheld instruments.
When designing with the LMR64010XMFX, ensure the chosen inductor has a saturation current rating at least 30% above the 1A internal switch limit to avoid saturation at cold temperatures, and select a Schottky rectifier with reverse voltage above 40V and average forward current above 1A. Keep the feedback trace short and away from the SW node to avoid noise injection that destabilizes the regulation loop.
This page synthesizes distributor pricing, drop-in SOT-23 alternatives, and practical inductor/diode design notes that go beyond the manufacturer datasheet, giving engineers a single-source engineering reference.
Alternativas directas para LMR64010XMFX/ — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con LMR64010XMFX/ (mismo factor de forma y huella) — difiere en Package, RoHS Status, Switching Frequency, Topology.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LMR64010XMFX/NOPB
✅ Sustitución directa✓ En stock
$1.15 / unidad
Ver hoja de datos →LMR64010XMF/NOPB
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LM2731XMFX/NOPB
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LM2733XMFX/NOPB
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LM27313XMFX/NOPB
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LMR64010XMFX/ Valores máximos y características eléctricas
| Topología | Boost (Step-Up) |
| Rango de tensión de entrada | 2.7 V to 14 V |
| Rango de tensión de salida | 3 V to 40 V (adjustable) |
| Switch Current (Internal) | 1 A (peak) |
| Frecuencia de conmutación | 1.6 MHz (typical) |
| Internal Switch Voltage Rating | 40 V |
| Shutdown Quiescent Current | < 1 µA |
| Control Mode | Current-mode PWM |
| Feedback Reference Voltage | 1.24 V (typical) |
| Rango de temperatura de funcionamiento | -40 °C to +125 °C |
| Encapsulado | SOT-23-5 (SC-74A / SOT-753, MFX) |
| Package Dimensions | 2.92 x 2.84 x 1.08 mm |
| Tipo de montaje | Surface Mount |
| Nivel MSL | 1 (unlimited) |
| Estado RoHS | Compliant (NOPB suffix) |
| Lead-Free | Yes (NOPB suffix) |
| Protection Features | Cycle-by-cycle current limit, thermal shutdown |
Configuración de pines de LMR64010XMFX/
| Pin 1 | SHDN — Shutdown/Enable input (logic high = enabled, low = <1 µA Iq standby) |
| Pin 2 | GND — Ground return |
| Pin 3 | FB — Feedback input (1.24 V internal reference, set VOUT via external resistor divider) |
| Pin 4 | SW — Switch node - internal 40V/1A DMOS drain |
| Pin 5 | VIN — Input supply (2.7 V to 14 V, bypassed locally with ceramic capacitor) |
Aplicaciones típicas
LMR64010XMFX/ es adecuado para 6 aplicacións: TFT-LCD Bias Supply, White-LED Driver / Backlight, Industrial 12V to 36V Sensor Bias, Portable / USB-OTG 5V Boost from Li-Ion, Battery-Powered Test Equipment, Networking / DSL Line-Driver Supply.
TFT-LCD Bias Supply
The LMR64010XMFX is an industry-standard reference choice for stepping 3.3 V or 5 V system rails up to the 12 V to 24 V VGH/VGL bias supplies required by TFT-LCD panels. The 1.6 MHz switching frequency sits above the gate-driver timing band, and the SOT-23-5 footprint leaves room for the compact display-module PCB. With the 1.24 V feedback reference and two external resistors, VOUT is set to any value up to 40 V, comfortably covering gate-driver rail requirements. The internal 40 V DMOS switch handles the demanding VGH rail, and the cycle-by-cycle current limit protects against inductor saturation during load transients. Engineers can also use the EN/SHDN pin to coordinate bias startup with the LCD logic rail, avoiding latch-up on cold-start.
Recomendado
White-LED Driver / Backlight
The LMR64010XMFX drives series strings of white LEDs for backlights and indicator lighting from a single-cell Li-ion or 5 V rail. A current-sense resistor in series with the LED string and the 1.24 V FB reference establishes constant-current regulation, while VOUT automatically tracks the LED string forward voltage (typically 9 V to 36 V for 3- to 12-LED strings). The 40 V internal switch with 1 A peak current comfortably handles 10- to 12-LED strings from a 3.3 V input, and the <1 µA shutdown quiescent current preserves battery life when the backlight is off. The 1.6 MHz switching frequency also avoids audible noise in the inductor, which matters for handheld and medical lighting.
Recomendado
Industrial 12V to 36V Sensor Bias
For industrial sensor excitation rails (loop-powered 4-20 mA transmitters, photoelectric sensors, and process-control transducers), the LMR64010XMFX provides a compact isolated-bias converter that steps a 5 V or 12 V control-rail supply up to the 24 V or 36 V needed by the transducer front-end. The 14 V maximum input lets it run directly from a regulated 12 V industrial bus without pre-regulation, and the 40 V internal switch tolerates the high step-up ratios typical of 24 V / 36 V transducer rails. The current-mode control topology and cycle-by-cycle current limit protect the converter against the inrush and short-circuit events common on long sensor cables.
Recomendado
Portable / USB-OTG 5V Boost from Li-Ion
Battery-powered portable equipment that needs a 5 V USB-OTG rail from a single Li-ion cell (3.0 V to 4.2 V) can use the LMR64010XMFX to generate that rail directly. With VOUT set to 5 V via the 1.24 V FB reference, the converter runs in continuous conduction above approximately 100 mA load, sustaining a typical 5 V/200 mA USB-OTG output from a 3.6 V battery. The <1 µA shutdown quiescent current is a major advantage for standby: the host can deassert the EN pin when USB-OTG is unused and drop Iq to under 1 µA, extending shelf life on Li-ion products.
Recomendado
Battery-Powered Test Equipment
Portable test and measurement instruments often need a 24 V or 36 V excitation rail for analog front-end signal conditioning, generated from a 5 V or 12 V Li-ion / SLA battery. The LMR64010XMFX delivers the 36 V rail in a 5-pin SOT-23 footprint that fits the small enclosures of handheld DMMs and oscilloscope probes. The 1.6 MHz switching frequency keeps the converter's fundamental ripple outside the instrument's measurement band, reducing AC noise on the analog front-end. Cycle-by-cycle current limit and thermal shutdown protect the instrument against the wiring faults and over-current events that occur in field service.
Recomendado
Networking / DSL Line-Driver Supply
Networking equipment, particularly DSL line-driver cards and xDSL central-office line interfaces, often need a -48 V reverse-polarity rail or a 24 V/36 V bias generated from a 12 V or 5 V backplane. The LMR64010XMFX delivers a regulated 24 V or 36 V bias in a footprint small enough to be placed locally on each line-driver card. The 1.6 MHz switching frequency and current-mode control simplify PCB layout for multi-channel line-driver boards, and the wide-input 2.7 V to 14 V range lets the same circuit run from either 5 V or 12 V backplanes without rework.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LMR64010XMFX/ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LMR64010XMFX/NOPB | LMR64010XMF/NOPB | LM2731XMFX/NOPB | LM2733XMFX/NOPB | LM27313XMFX/NOPB |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | SOT-23-5 (SC-74A / SOT-753) | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same |
| Input Voltage Range | 2.7 V to 14 V | 2.7 V to 14 V | 2.7 V to 14 V | 2.7 V to 14 V | 2.7 V to 14 V | 2.7 V to 14 V |
| Max Output Voltage | 40 V | 40 V | 40 V | 22 V | 40 V | 20 V |
| Switch Current | 1 A | 1 A | 1 A | 1 A | 1 A | 1 A |
| Switching Frequency | 1.6 MHz | 1.6 MHz | 1.6 MHz | 1.6 MHz | 1.6 MHz | 1.6 MHz |
| AEC-Q100 Grade | No | No | No | No | No | Q1 version available |
| RoHS Status (NOPB suffix) | Lead finish variant dependent | Yes (NOPB) | Yes (NOPB) | Yes (NOPB) | Yes (NOPB) | Yes (NOPB) |
Diferenciadores clave
- Highest 40V output in the SIMPLE SWITCHER SOT-23-5 family (frente a LM2731XMFX/NOPB)
- Standard leaded and lead-free finishes both available (frente a LMR64010XMF/NOPB)
- Q1 AEC-Q100 option in same footprint (frente a LM27313XMFX/NOPB-Q1)
Notas de diseño
Estimated: at VIN=5 V, VOUT=12 V, IOUT=200 mA, expected input-side power is ~2.4 W, of which approximately 0.5 W is dissipated inside the LMR64010XMFX for an efficiency of ~83%. Keep the loop formed by the input capacitor, internal switch, Schottky diode, and output capacitor as tight as possible - place the input bypass ceramic within 2 mm of the VIN and GND pins and route the SW trace directly to the inductor and Schottky. The exposed pad on the bottom of the SOT-23-5 package is not a thermal pad on this part; it is a logic pin - follow the TI layout in the datasheet, not generic QFN advice.
Two pitfalls recur in LMR64010XMFX designs. First, do not exceed a 1 µF output capacitance without re-checking loop stability; the internal compensation is sized for the recommended 1 µF to 22 µF ceramic output. Second, never leave the FB node floating - the part requires a feedback divider on FB at all times. A floating FB forces VOUT to the internal 40 V clamp and can over-stress downstream load. Always populate the FB divider with at least 10 kΩ resistors to keep FB bias current error negligible.
The 1.6 MHz fundamental and its harmonics fall above the AM broadcast band, simplifying EMI compliance, but the SW-node rise time can still couple into nearby analog traces. Keep the SW trace short, use a shielded power inductor, and place the Schottky diode as close as possible to the SW pin. A small RC snubber (10 Ω + 470 pF) across the Schottky is often needed to reduce ringing when driving long cables or large output caps. According to TI application notes for the SIMPLE SWITCHER family, the snubber value should be tuned to damp the first ringing peak without increasing switching loss.
Información de cumplimiento
Lead-free (NOPB suffix) variant is RoHS compliant per TI product page. Non-NOPB XMFX variant uses leaded finish; not RoHS. Standard part is not AEC-Q100 qualified - choose LM27313-Q1 for automotive.
