RT8005

1A, 2MHz, High-Efficiency Synchronous Buck PWM Converter

The RT8005 is a high-efficiency synchronous buck PWM converter with integrated P-Channel and N-Channel power MOSFET switches. Capable of delivering 1A output current over a wide input voltage range of 2.4V to 5.5V, the RT8005 is ideally suited for portable applications powered by a single Li-Ion battery or by 3-cell NiMH/NiCd batteries. The device operates at 2MHz PWM switching fixed frequency, can use smaller C_IN, C_OUT capacitor and inductor.The RT8005 integrates two low R_DS(ON) 230mΩ and 180mΩ of high and low side switching MOSFETs to reduce board space, as only resistors and capacitors along with one inductor are required externally for operation. The RT8005 has adjustable output range down to 0.5V. The other features include internal soft-start, chip enable, over temperature and over current protections. It is available in a space-saving VDFN-10L 3x3 package.

Applications

Battery-Powered Equipments
Low Power CPU and DSP Supplies
Digital Cameras and Hard Disks
Protable Instruments and Notebook Computers
Celluar Phones, PDAs, and Handheld PCs
USB-Based DSL Modems and Other Network Interface Cards

Key Spec.
	RT8005
Status	Active
Vin (min) (V)	2.4
Vin (max) (V)	5.5
Number of Outputs	1
Vout (min) (V)	0.5
Vout (max) (V)	5.5
Output Adj. Method	Resistor
Iout (max) (A)	1
Current Limit (typ) (A)	1.8
Freq (typ) (kHz)	2000
Ext Sync	No
Ron_HS (typ) (mOhm)	230
Ron_LS (typ) (mOhm)	180
Iq (typ) (mA)	0.2
Features	100% Duty Cycle;Current Mode Control;Enable Input;OCP;Stable with Ceramic Capacitor
Package Type	VDFN3x3-10

Features

2.4V to 5.5V Input Voltage Range
Adjustable Output from 0.5V to V_IN
Guaranteed 1A Output Current
Accurate Reference : 0.5V (± 1.5%)
Up to 90% Conversion Efficiency
Typical Quiescent Current : 200μA
Integrated Low R_DS(ON) High and Low Side Power MOSFET Switches : 230mΩ and 180mΩ
Current Mode PWM Operation
Fixed Frequency : 2MHz
100% Maximum Duty Cycle for Lowest Dropout
Internal Soft-Start
No Schottky Diode Required
Over Temperature and Over Current Protection
Small 10-Lead VDFN 3x3 Package
RoHS Compliant and 100% Lead (Pb)-Free

Datasheet
Title	Last Update	Download
1A, 2MHz, High-Efficiency Synchronous Buck PWM Converter	2015/04/29

Videos
Title	Last Update	Views
How to estimate control loop bandwidth from the transient response time?	2017/03/30	2389

Reference Design
Title	Last Update	Download
Richtek Load Transient Tool	2022/07/25

Please confirm with our distributor or sales representative for actual stock status.