AP2125K-1.8TRG1 

The AP2125K-1.8TRG1 is a 300mA, high speed, very low noise CMOS LDO regulator. These ICs are equipped with a reference voltage source, error amplifier, resistor network for setting the output voltage, chip enable circuit, current limit circuit and OTSD (over temperature shutdown) circuit to prevent the IC from over-current and over-temperature. The AP2125K-1.8TRG1 features high ripple rejection, low dropout voltage, low noise, high output voltage accuracy and low current consumption, making it ideal for use in a variety of battery-powered devices.

Main applications: CDMA/GSM cellular phones, battery-powered devices, notebook computers, PDAs, handheld instruments, PCMCIA cards, portable information devices

ULN2003AIPWR 

The Texas Instruments ULN2003AIPWR is a 50 V, 7-channel Darlington transistor array with an operating temperature range of -40°C to 105°C. The ULN2003AIPWR devices are high-voltage, high-current Darlington transistor arrays. Each device consists of seven NPN Darlington pairs with high voltage outputs and a common cathode clamp diode for switching inductive loads. The collector current rating of a single Darlington pair is 500mA. connecting Darlington pairs in parallel can provide higher currents.

Main applications: relay drivers, stepper and brush DC motor drivers, lamp drivers, display drivers (LEDs and gas discharge elements), line drivers, logic buffers

BZX84C15LT3 

The ON Semiconductor BZX84C15LT3 is a zener regulator. The devices are available in a convenient surface mount plastic SOT-23 package. These devices are designed to provide voltage regulation with minimal space requirements. They are well suited for applications such as cell phones, handheld portable devices, and high-density PC boards.

Main applications: Cellular Phones, Handheld Portable Devices, High Density PC Boards, etc.

TPS767D301PWPR 

The Texas Instruments TPS767D301PWPR is a 1A, 10V, dual channel, low dropout regulator with power-on indication and enable functions.

Main applications:DSP Applications

LP2985IM5-5.7/NOPB

The Texas Instruments LP2985IM5-5.7/NOPB is a 150mA, 16V, low dropout voltage regulator with enable capability. Using an optimized vertically integrated PNP (VIP) process, the LP2985IM5-5.7/NOPB provides unmatched performance for all battery-powered designs. By adding a 10nF bypass capacitor, the output noise can be reduced to 30 μV RMS in 30kHz bandwidth.

Main applications:cell phones, PDAs, laptops, personal digital assistants, camcorders, personal stereos, cameras

SA555DR 

The Texas Instruments SA555DR is a precision timer with an operating temperature range of -55°C to 85°C. It is capable of generating accurate time delays or time intervals. It is capable of generating precise time delays or oscillations. In delay or monostable operation modes, the timing interval is controlled by a single external resistor and capacitor network. In steady-state operation mode, frequency and duty cycle are independently controlled by two external resistors and a single external capacitor.

Main applications: fingerprint biometrics, iris biometrics, RFID readers

CY8CMBR3108-LQXI

The Cypress CY8CMBR3108-LQXI is the CY8CMBR3xxx CapSense® Express™ controller with Smart Sense. The CY8CMBR3xxx CapSense® Express™ controller enables an advanced and easy-to-implement capacitive touch-sensitive user interface solution. The register configurable family supports up to 16 capacitive sensing inputs without time-consuming firmware development. These controllers are ideal for implementing capacitive button, slider, and proximity sensing solutions with minimal development cycles.

Main applications: Suitable for a variety of capacitive sensing designs

LPC1788FBD208K 

The NXP Semiconductors LPC1788FBD208K is an ARM Cortex-M3 microcontroller for embedded applications with a high level of integration and low power consumption at 120 MHz. Features include 512 kB flash memory, 96 kB data memory, Ethernet, USB 2.0 host/OTG/device, 8-channel DMA controller, 5 UART, 2 CAN channels, 3 SSP/SPI, 3 I2C, I2S, 8-channel 12-bit ADC, 10-bit DAC, QEI, LCD controller, SD/MMC interface, motor control PWM, 4 general-purpose timers, 6-output general-purpose PWM, ultra-low-power real-time clock with independent battery power, and up to 165 general-purpose I/O pins.

Main applications:  Embedded Applications

AS5030-ATST 

The Ahmers Osram AS5030-ATST is an 8-bit rotary position sensor with digital angle (interface) and PWM output.The AS5030-ATST is an 8-bit rotary position sensor (formerly called encoder) based on non-contact magnetic sensor technology for absolute angle measurement over the entire rotation range of 360° rotation. The device is ideally suited for coaxial applications where a simple 2-pole magnet rotates above or below the sensor IC and the zero position can be programmed into the device. The absolute magnet angular position is measured with a resolution of 8 bits = 256 positions per revolution and is provided as a digital value on the serial interface (SSI) and PWM output signals.

Main applications: motor position and motion sensors, knobs for human-machine interfaces, position sensors for battery-powered devices, robots

BAV99,215 

Ansys Semiconductor BAV99,215 are high-speed switching diodes packaged in small SOT23 (TO-236AB) surface mount device (SMD) plastic packages. High switching speed: trr ≤ 4 ns, low capacitance: Cd ≤ 1.5 pF, low leakage current, reverse voltage: VR ≤ 100 V.

Main applications: High-speed switching, reverse polarity protection, general purpose switching

What other chips do you usually use

but are not on the list?please tell me!