Portable Handsets

			Portable Handsets Portable Handsets come with a variety of functionality to enable operation as a simple communications device, a still picture or video camera, an MP3 player, a handheld wireless access point, or more. Micrel offers a broad selection of products for these applications. Click on the product family shown below to see our recommend product solutions and applications notes or click on Full List to see all of the products we make for this application.

Baseband Power Management and System Management

Linear Solutions for Power Management of Microprocessors and Applications Processors
MIC2210 - Dual µCap LDO w/ Open-Drain Driver	MIC5253 - 100mA Low Noise µCap Teeny LDO
MIC2211 - Dual µCap LDO	MIC5365 - High Performance Single 150mA LDO
MIC2212 - Dual µCap with POR	MIC5256 - 150mA µCap LDO w/ Error Flag
MIC2213 - Sequenced Portable Power Management IC	MIC5320 - Dual, High Performance 150mA µCap ULDO™
MIC2214 - Portable Power Management IC	MIC5301 - Single, 150mA µCap ULDO™
MIC5213 - 80mA SC-70 µCap LDO	MIC5311 - Dual µCap LDO w/ LOWQ Mode
MIC5219 - 500mA Peak Current LDO	MIC5312 - Dual µCap LDO w/POR and LOWQ Mode
MIC5247 - 150mA, Low Voltage µCap LDO	MIC5319 - 500mA µCap LDO

PMIC Solutions for Power Management of Microprocessors and Applications Processors

MIC2826 - Integrated single 500mA PWM/PFM synchronous buck (step-down) regulator with three Low Dropout Regulators and 400kHz I²C interface

MIC2827 - Integrated single 500mA PWM/PFM synchronous buck (step-down) regulator with two Low Dropout Regulators and 400kHz I²C interface

MIC2829 - 3G/4G HEDGE/LTE PMIC with Six DC/DC Buck Converters, Eleven LDOs and SIM Card Level Translator

Switchmode DC/DC Converter Solutions for High Efficiency Power Management of Microprocessors and Applications Processors
MIC2202 - 2MHz PWM Buck Regulator	MIC2205 - LOWQ Mode 2MHz Buck Regulator
MIC2203 - 1MHz PWM Buck Regulator	MIC2206 - LOWQ Mode 2MHz Buck Regulator w/ voltage scaling
MIC2204 - 2MHz PWM Buck Regulator

USB Connectivity Products (Transceivers)
MIC2550A - USB Transceiver	MIC2555 - USB On-the-go (OTG) Transceiver
MIC2551A - USB Transceiver

Power MOSFET Switches and Smart Load Switches
MIC94050/1 - P-Channel MOSFETs	MIC94060/1 - Smart Load Switches
MIC94052/3 - P-Channel MOSFETs	MIC94062/3 - Soft-Start Smart Load Switches

Micropower Op Amps
MIC860 Teeny Ultra Low Power Op Amp	MIC862 Dual Ultra Low Power Op Amp in SOT23-8
MIC861 Teeny Ultra Low Power Op Amp	MIC863 Dual Ultra Low Power Op Amp in SOT23-8

Micropower Voltage Monitors
MIC841 Teeny Voltage Monitor w/Adjustable Hysteresis	MIC842 Teeny Voltage Monitor w/Fixed Hysteresis

Application Hint 53: Power Supply for Memory with Ultra-Low Power Memory Refresh Circuit

RF Power Management

Linear Solutions - Low Noise LDO Regulators for RF Applications
MIC2211 Dual µCap LDO	MIC5301 - Single, 150mA µCap ULDO™
MIC2215 - Triple RF LDO	MIC5305 - 150mA Next Gen CMOS LDO
MIC5252 - 150mA High PSRR µCap LDO	MIC5319 - 500mA µCap LDO
MIC5253 - 100mA Low Noise µCap Teeny LDO

Switching Solutions - Power Amplifier Power Supply using DC/DC Converters + P-Channel Bypass Switch
MIC2202 - 2MHz PWM Buck Regulator	MIC94060/1 - Smart Load Switches
MIC2224 - RF Power Amplifier Power Supply	MIC3291 - 1.2MHz PWM White LED Driver with Internal Schottky Diode and Single-Wire Linear Brightness Control

Application Hint 52: High Efficiency, DAC Controlled Power Amplifier Power Supply Circuit using the MIC2204 + MIC94060

Display Power Management

Linear Solutions
MIC5253 - 100mA, µCap TeenyLDO	MIC5271 - 100mA, Negative µCap LDO

Switching Solutions
MIC2287 - 1.2MHz Boost White LED Driver (up to 8 LEDs)	MIC2295 - 1.2MHz High Current Boost Converter for Organic EL Panels
MIC2288 - 1.2MHz Boost Converter for Organic EL Panels	MIC2296 - 600KHz, 1.2A Boost Converter
MIC2289 - 1.2MHz White LED Driver with Integrated Schottky Diode (up to 8 LEDs)	MIC2297 - 600KHz, 40V White LED Driver (up to 10 LEDs)
MIC2290 - 1.2MHz PWM Boost Converter with Integrated Schottky Diode	MIC3287 - 1.2MHz White LED Driver (up to 4 LEDs)
MIC2291 - 1.2MHz Camera Flash Boost Converter	MIC4826 - 160Vpp Electroluminescent Display Driver
MIC2292 - 1.6MHz White LED Driver with Integrated Schottky Diode (up to 8 LEDs)	MIC4827 - 180Vpp Electroluminescent Display Driver
MIC2293 - 2 MHz White LED Driver with Integrated Schottky Diode (up to 8 LEDs)

Application Note 36: Electroluminescent Display Drivers	Application Hint 50: TFT LCD Bias Supply +/-8V Using MIC2142+MIC5271
Application Note 40: White LEDs vs. CCFL for Backlighting Displays in Mobile Electronics	Application Hint 51: High Efficiency Photo Flash Application for Integrated Camera/Mobile Phones

Application Specific Circuits for Mobile Phones

Linear Solutions

MIC2219 - Dual LDO for Keypad Dimming and Vibrator Motor Control

Lithium-Ion Battery Chargers

Switching Solutions

MIC4682 - Constant Current, Constant Voltage Switchmode Voltage Regulator

Linear Solutions

MIC79050 - Simple Lithium-Ion Battery Charger

MIC79110 - Simple, Full Featured 1.2A Battery Charger in 3mm x 3mm MLF