October 2021

1 Power ManagementProduct Selection Guide October 202102 IntroductionWho We AreFounded in 1998, Richtek is one of the global leading analog companies in design and development of comprehensive and cost-competitive power management IC products for consumer electronics, computers, communications equipment, and industrial and automotive products. After the completion of merger with MediaTek in 2016, Richtek has broadened the product range for more diverse applications. Richtek not only delivers the industry's most cost-competitive power management ICs, but also provides the complete system design -in service and support. With Richtek as "Your Power Partner" you can spend less time trouble-shooting issues with power management and more time working on your next big We OfferRichtek offers comprehensive power solutions which range from DC/DC regulators to power management multi-channel ICs.

2 Richtek aims to accelerate your design with the variety of design support, such as Richtek DesignerTM the powerful online design generator and simulation tool, application notes, technical documents, and more. Additionally, you can sign up for My Richtek for free samples, a selection of evaluation boards (EVBs) and the latest Richtek technical and product and Reliability CommitmentRichtek has established an innovative and dynamic quality management system. As a result of this system, we have attained and continued to maintain ISO 9000 and ISO 14000 certification. Richtek is committed to protecting the environment and conforming to the regulation requirements with the declaration of RoHS, the declaration of REACH and more green product files for of ContentsLinear Regulators 04 Low Vin LDOs with Fixed Output Voltage 04 Low Vin LDOs with Adjustable Output Voltage 05 Wide Vin LDOs 06 Ultra Low Vin LDOs 07 Ultra Low Quiescent Current LDOs 08 Low Noise & High PSRR LDOs 09 Automotive Graded & Industrial LDOs 10 Switching Regulators 11 Buck Converters 11 Low Voltage Buck Converters 12 Medium Voltage Buck Converters 17 High Voltage Buck Converters 25 Buck Controllers 29 Boost Converters 30 Boost Controllers 30 Buck-Boost Converters 31 Memory Power Solutions 32 DDR I/II/III/IV Power Solutions 32 Battery Management 33 Single Cell Li-Ion Linear Battery Chargers 33 Single Cell Li-Ion Switching Battery Chargers 34 Battery Fuel Gauge 35 Monitoring and Protection 36 Secure

3 Authentication 36 Wireless Power Solutions 37 LCD and OLED Display Power 38 White LED Drivers for Display Backlighting 38 AMOLED Display Drivers 39 Power Management Multi-Channel ICs 40 PC 40 Portable Devices 41 SSD 42 TV and Home Entertainment 42 Automotive 43AC-DC 44 Multi-Mode Flyback Controllers 44 Audio 45 Class-D Audio Power Amplifiers 45 Audio Switches 45 Gate Drivers 46 Single Phase Synchronous Rectified Buck MOSFET Drivers 46 Operational Amplifiers 47 High Speed Operational Amplifiers 47 Supervisors & Reset ICs 48 Monitoring and Protection 48 Switches 49 High Side Power Switches 49 USB-C Controller with Power Switches 50 USB Accessory Detector Switch 50 USB Type-C & Power Delivery Solutions 51 USB Type-C & PD Controllers 51 USB-C Over Voltage Protection 53 e-Marker Solutions 53 USB PD Travel Adapter Reference Designs 54 BLDC Motor Drivers 55 BLDC Motor Drivers 5504 Low dropout linear regulators (LDOs) can be used in applications which require to drop a higher input voltage to a lower output voltage at relatively moderate power levels.

4 Richtek has developed a broad portfolio of LDOs which feature high power supply ripple rejection (PSRR) to keep the output voltage free of noise and ripple, low quiescent current (Iq) to extend battery life and different packaging for various power dissipation. Our wide input-voltage LDOs can be applied in industrial applications. The high-performance AEC-Q100 qualified LDOs are ideal for automotive LDO s are grouped as following: Low Vin LDOs with Fixed/Adjustable Output Voltage (Vin max ) Wide Vin LDOs (Vin max 80V) Ultra Low Vin LDOs (Vin min ) Ultra Low Quiescent Current LDOs (Iq 2uA) Low Noise & High PSRR LDOs Automotive-graded and Industrial LDOsVin max : This selection table is suitable for general linear regulator building block requiring minimal external components.

5 Part NumberVinVoutIoutIqVdropout@ rated currentFeaturesPackage(s) min(V)max(V)min(V)max(V)max(mA)typ(uA) typ (mV) @ Input; Low Dropout; Low Iq; Tiny @ Input; Low Iq; Low @ Input; Extra Low Noise; Low @ Input; Low Iq; Low Dropout; TSOT-23-5 Low Vin LDOs with Fixed Output Voltage Linear Regulators05 Adjustable output voltage via resistor divider and Vin max : This selection table is suitable for general linear regulator building block with extra flexibility of adjustable output voltage and other features such as low noise or high PSRR. Part NumberVinVoutIoutIqVdropout@ rated currentFeaturesPackage(s) min(V)max(V) min(V) max(V) max(mA) typ(uA) typ (mV) @ 1 AEnable Input; Adj. Soft-Start; High PSRR 38dB @1 MHz; Low Noise of x Vout Vrms; Industrial @ 1 AEnable Input; Extra Low Noise; High PSRR; AEC-Q100 Qualified @ Input; Power Good; Adj.

6 Soft-Start; High PSRR 38dB @500kHz; Low Noise 7uVrms; Industrial @ 2 AEnable Input; Power Good; Adj. Soft-Start; Easy Vout (Set Vout by PCB); High PSRR 40dB @500kHz; Low Noise ; Industrial @ 2 AEnable Input; Low Dropout; Industrial @ 2 AEnable Input; Low Dropout; AEC-Q100 @ 3 AEnable Input; Power Good; Adj. Soft-Start; Easy Vout (Set Vout by PCB); High PSRR 40dB @500kHz; Low Noise ; Industrial @ 3 AEnable Input; Power Good; Adj. Soft-Start; Easy Vout (Set Vout by PCB); High PSRR 40dB @500kHz; Low Noise 7uVrms; Industrial Low Vin LDOs with Adjustable Output Voltage06 Wide Vin LDOsLDOs with input voltage higher than can be used in applications with wider input voltage range up to 80V. Please note that the LDO power dissipation is (Vin-Vout) * I_load so a high (Vin Vout) drop will quickly lead to high LDO dissipation at moderate load NumberVinVoutIoutIqVdropout@ rated currentFeaturesPackage(s)min(V)max(V) min(V)max(V)max(mA) typ(uA) typ (mV) @ Wide Input Voltage Range; Enable Input (A: low shutdown) @ Wide Input Voltage Range; Enable Input (B: high shutdown) @ Wide Input Voltage Range; Enable InputMSOP-8(PP); @ Iq; Enable Input;AEC-Q100 @ Low Noise; High PSRR; Low IqSOT-23; @ Wide Input Voltage Range; Enable InputPSOP-8; @ Input; Low Dropout; Low Iq PSOP-8; SOT-23-5; SOT-89-5.

7 @ InputTSOT-23-507 Ultra Low Vin LDOs Ultra low Vin LDOs are specially designed for low drop-out voltage in applications with relatively low input voltage. Some of these LDOs require an external low power bias voltage which needs to be at least higher than the output voltage and thereby limits the maximum output voltage for these parts. LDOs with internal charge pump do not need the external bias voltage and have a wider output voltage range. * Newly released parts are marked in NumberVinVoutIoutIqVdropout@ rated currentFeaturesVbiasPackage(s)min(V)max( V)min(V)max(V)max(mA) typ(uA) typ (mV) @ Input; Low Dropout output accuracyNeeds ~ Bias @ Input; Low Dropout, 1% output accuracyNeeds ~ Bias @ 1 AEnable Input; Low Noise; High PSRR; Tiny Package Needs Ext. 3 ~ Bias (BSC) @ 2 AAdj.

8 Soft-Start; Low Dropout; Power Good; AEC-Q100 QualifiedNeeds ~ Bias @ 2 AUltra-low Noise 10 V; Ultra High PSRR 40dB @ 500kHz; Adj. Soft -Start; Industrial GradeInt. Charge @ 2 AEnable Input; Low Dropout; Industrial GradeInt. Charge @ 3 AUltra-low Noise ; Ultra-high PSRR 40dB @ 500kHz; Adj. Soft-Start; Industrial GradeInt. Charge @ 3 AEnable Input; Low Dropout; Power GoodNeeds ~ Bias VoltagePSOP-8; @ 3A1% Vref; Enable Input; Low Dropout; Power GoodNeeds ~ Bias @ 3 AUltra-low Noise 10 V; Ultra-High PSRR 40dB @ 500kHz; Adj. Soft-Start; Industrial GradeInt. Charge with ultra-low quiescent current have an important feature that reduces LDO ground current at light load and helps extend battery life in portable applications. Richtek s low Iq products also have dynamic ground current that will quickly increase ground current when load increases.

9 This helps improve load transient response, which makes it ideal for applications that run in burst mode conditions. All low Iq LDOs are fixed output voltage versions. Ultra Low Quiescent Current LDOsPart NumberVinVoutIoutIqVdropout@ rated currentFeaturesPackage(s) min(V)max(V)min(V)max(V) max(mA) typ(uA) typ (mV) @ Iq; Enable Input;AEC-Q100 @ Low Noise; High PSRR; Low IqSOT-23; @ Input; Low Dropout; Low Iq PSOP-8; SOT-23-5; SOT-89-5; @ Input; Low Dropout;Low Iq; Tiny @ Input; Low Iq; Low @ Input; Low Iq; Low Dropout TSOT-23-509 For noise-sensitive systems to filter out input ripple and provide low noise/high PSRR at the output. Low Noise & High PSRR LDOsPart NumberVinVoutIoutIqVdropout@ rated currentFeaturesPackage(s)min(V)max(V)min (V)max(V)max(mA)typ(uA) typ(mV) @ Low Noise; High PSRR; Low IqSOT-23; @ 1 AEnable Input; Extra Low Noise; High PSRR; AEC-Q100 @ 1 AEnable Input; Extra Low Noise; Ultra High PSRR; High BW; Low Dropout; Industrial @ Input; Extra Low Noise; High PSRR; OCP; Power @ 2 AUltra-Low noise 10 V; Ultra-High PSRR 40dB @ 500kHz; Adj.

10 Soft-Start; Industrial Grade @ 3 AAdj. Soft-Start;Enable Input;Extra low Noise;High PSRR; OCP; Power @ 3 AUltra-Low Noise ;Ultra-High PSRR 40dB @ 500kHz; Adj. Soft-Start; Industrial graded LDOs are fully AEC-Q100 qualified, specifically designed to meet automotive requirements, such as low quiescent current for always on systems, or low noise and High PSRR for noise sensitive applications. Automotive Graded & Industrial LDOs * Newly released parts are marked in NumberVinVoutIoutIqVdropout@ rated currentFeaturesPackage(s)min(V)max(V)min (V)max(V)max(mA)typ(uA) typ(mV) @ Iq; Enable Input; AEC-Q100 @ Input; OCP;AEC-Q100 @ 1 AEnable Input; Extra Low Noise; High PSRR; AEC-Q100 @ 1 AEnable Input; Extra Low Noise; Ultra High PSRR; High BW; Low Dropout; Industrial @ 2 AEnable Input; Low Dropout; Industrial @ 2 AAdj.