National Manuals (Industrial)

The LM2750 is a regulated switched-capacitor doubler that produces a low-noise output voltage. The 5.0V output voltage option (LM2750-5.0) can supply up to 120mA of output current over a 2.9V to 5.6V input range, as well as up to 40mA of output current when the input voltage is as low as 2.7V. An adjustable output voltage option with similar output current capabilities is also available (LM2750-ADJ). The LM2750 has been placed in National’s 10-pin LLP, a package with excellent thermal properties that keeps the part from overheating under almost all rated operating conditions A perfect fit for space-constrained, battery-powered applications, the LM2750 requires only 3 external components: one input capacitor, one output capacitor, and one flying capacitor. Small, inexpensive ceramic capacitors are recommended for use. These capacitors, in conjunction with the 1.7MHz fixed switching frequency of the LM2750, yield low output voltage ripple, beneficial for systems requiring a low-noise supply. Pre-regulation minimizes input current ripple, reducing input noise to negligible levels. A tightly controlled soft-start feature limits inrush currents during part activation. Shutdown completely disconnects the load from the input. Output current limiting and thermal shutdown circuitry protect both the LM2750 and connected devices in the event of output shorts or excessive current loads.

File format: PDF Size:780 KB

LM3886 is a high-performance audio power amplifier from TI that delivers 68W of continuous average power and 0.1% THD+N, meeting the needs of various audio applications.

File format: PDF Size:853 KB

LM3881 Power Sequencer offers the easiest method to control power up and power down of multiple power supplies (switching or linear regulators).

File format: PDF Size:243 KB

LM380 is a 2.5W audio amplifier. The input signal can be ground referenced, the output voltage is automatically centered at one-half the supply voltage. There is short circuit protection and the output power range is wide. It can be used in various audio systems.

File format: PDF Size:273 KB

The LMV1089 is a dual input, Clarisound Far Field Noise Suppression Microphone Amplifier with Automatic Calibration Capability

File format: PDF Size:1443 KB

LM27961 is a charge-pump-based white-LED driver that is ideal for mobile phone display backlighting. It can drive 4 LEDs for a main phone display backlight and 3 LEDs for a sub-display backlight. The driver provides excellent current and brightness matching in all LEDs. The LED driver current sources are split into two independently controlled groups. The primary group (Group A) can be used to backlight a main phone display with up to 4 LEDs, with low-side current drivers accommodating common-anode-type LEDs. The second group (Group B) can backlight a secondary display with up to 3 LEDs, with high-side current drivers accommodating common-cathode-type LEDs. Both Group A and Group B can also drive standard two-terminal LEDs, and provide other general lighting functions (keypad lighting, fun lighting, etc). The brightness of the two LED groups can be adjusted independently with external resistors. The LM27961 works off an extended Li-Ion input voltage range (2.7V to 5.5V), achieving voltage boost with a high-efficiency 3/2x-gain charge pump. The LM27961 is available in National’s chip-scale 18-bump micro SMD package.

File format: PDF Size:712 KB

The DS90CP04 1.5 Gbps 4x4 LVDS Crosspoint Switch is a digital cross-point switch produced by National Semiconductor Corporation. It uses Low Voltage Differential Swing (LVDS) technology for low power, high speed and low noise.

File format: PDF Size:409 KB

File format: PDF Size:0 KB

LM2622 is a National Semiconductor 1.6A, 0.2Ω internal switch, 600kHz/1.3MHz frequency selectable step-up DC/DC converter, suitable for TFT display voltage adjustment.

File format: PDF Size:465 KB

The LM3687 is a step-down DC-DC converter with an integrated low dropout Linear Regulator optimized for powering ultra-low voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd batteries. It provides a dual output with fixed output voltages and combined load current up to 750mA in post regulation mode or 1100mA in independent mode of operation, over an input voltage range from 2.7V to 5.5V. There are several different fixed output voltage combinations available (refer to table 'Voltage Options'). The Linear Regulator being driven from the fixed output voltage of the buck converter (post regulation) translates to high efficiency. The device offers superior features and performance for mobile phones and similar portable applications with complex power management systems. Automatic intelligent switching between PWM low-noise and PFM low-current mode offers improved efficiency over the full load current range. During full-power operation, a fixed-frequency 1.8MHz (typ.) PWM mode drives loads from ~80mA to 750mA max. Hysteretic PFM mode extends the battery life through reduction of the quiescent current during light loads and system standby. The LM3687 also features internal protection against over-temperature, current overload and under-voltage conditions. Two enable pins allow the separate operation of either the DC-DC or the Linear Regulator.

File format: PDF Size:628 KB

The LM2753 is a high-power switched capacitor voltage converter/flash LED driver. It can drive a flash LED with a pulsed current of 400mA at an input voltage of 3.6V. The device uses a switched capacitor doubler and provides a regulated 5V output (VOUT) over an input supply range of 3.0V to 5.5V. The switched output, IOUT, takes less than 10ns to turn on and provide maximum current to a Flash LED. Flash LED current is set via a ballast resistor. Continuous illumination current (Torch Mode) is programmed by connecting a resistor between IOUT and VOUT. This device uses only three small, low-cost ceramic capacitors. The LM2753 uses Pulse Frequency Modulation (PFM) regulation. Typical operating frequency is 725kHz. Under no-load conditions, the LM2753 operates on only 60µA. If the output is connected to ground, the charge pump stays in the gain of 1 which helps limit the input current to 300mA (typ.). The LM2753 is available in a 10-pin No Pullback Leadless Lead-frame Package: LLP-10.

File format: PDF Size:1178 KB

The LM3352 is a switched capacitor DC/DC converter from National Semiconductor. It can convert an input voltage from 2.5V to 5.5V to a stable output voltage of 2.5V, 3.0V or 3.3V, with a maximum output current of 200mA and an average efficiency of greater than 80%. The switching frequency is 1MHz. The device is available in a 16-pin TSSOP package, with low operating and standby current, making it ideal for portable and handheld applications.

File format: PDF Size:546 KB

ADC121C021/ADC121C027 I2C-compatible, 12-Bit Analog-to-Digital Converter (ADC) with Alert Function

File format: PDF Size:757 KB

This document introduces the LMP7721, a precision amplifier with an ultra-low input bias current of 3 fA, a supply voltage range of 1.8V to 5.5V, and is ideal for battery-powered portable applications.

File format: PDF Size:603 KB

The LMD18245 is a 3A, 55V DMOS full-bridge motor driver that incorporates all the circuitry required to drive and control current in a brushed type DC motor or one phase of a bipolar stepper motor.

File format: PDF Size:1095 KB

File format: PDF Size:0 KB

The LMD18201 is a 3A H-Bridge designed for motion control applications. The device is built using a multi-technology process which combines bipolar and CMOS control circuitry with DMOS power devices on the same monolithic structure. The H-Bridge configuration is ideal for driving DC and step-per motors. The LMD18201 accommodates peak output currents up to 6A. Current sensing can be achieved via a small sense resistor connected in series with the power ground lead. For current sensing without disturbing the path of current to the load, the LMD18200 is recommended.

File format: PDF Size:703 KB

This document describes the features and characteristics of CD4023BM and CD4025BM, which are buffered triple 3-input NAND gate and buffered triple 3-input NOR gate, respectively. These gates are constructed with complementary metal-oxide-semiconductor (CMOS) integrated circuits, and have equal source and sink current capabilities, conforming to standard B series output drive. The devices also have buffered outputs which improve transfer characteristics by providing very high gain. All inputs are protected against static discharge with diodes to VDD and VSS.

File format: PDF Size:129 KB

LM3691 is a high-accuracy, miniature, 1A step-down DC-DC converter from TI that is optimized for powering ultra-low voltage circuits from a single Li-Ion cell or three cell NiMH/NiCd batteries. It provides up to 1A load current over an input voltage range from 2.3V to 5.5V. There are several different fixed voltage output options available. LM3691 has a mode-control pin that allows the user to select Forced PWM mode or ECO mode that changes modes between gated PWM mode and PWM automatically depending on the load. In ECO mode, LM3691 offers superior efficiency and very low Iq under light load conditions. ECO mode extends the battery life through reduction of the quiescent current during light load conditions and system standby. LM3691 is available in a 6-bump micro SMD package. Only three external surface-mount components are required: a 1μH inductor, a 4.7μF input capacitor and a 4.7μF output capacitor.

File format: PDF Size:2205 KB

LP38691-ADJ/LP38693-ADJ 500mA Low Dropout CMOS Linear Regulators with Adjustable Output Stable with Ceramic Output Capacitors

File format: PDF Size:336 KB