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RT9261CB, RT9262A, RT9262ACE

Table of contents:
Info of RT9261CB
Info of RT9262A
Info of RT9262ACE

RT9261CB, RT9262A, RT9262ACE Selling Leads, Datasheet

MFG:RichTek Package Cooled:2041.7061069 D/C:SOT23/5

RT9261CB, RT9262A, RT9262ACE Datasheet download

Five Points

Part Number: RT9261CB

MFG: RichTek

Package Cooled: 2041.7061069

D/C: SOT23/5

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RT9262A General Description

The RT9262/A is a compact, high efficient, step-up DC/DC converter with an adaptive current mode PWM control loop, providing a stable and high efficient operation over a wide range of load currents. It operates in both continuous and
discontinuous current modes in stable waveforms without external compensation.

The low start-up input voltage below 1V makes RT9262/A suitable for 1 to 4 battery cell applications providing up to 400mA output current. The 550KHz high switching rate minimized the size of external components. Besides, the 17µA low quiescent current together with high efficiency maintains long battery lifetime.

The 1.8V to 5V output voltage is set with 2 external resistors. Both internal 2A switch and driver for driving external power devices (NMOS or NPN) are provided.

A 300mA LDO is included in RT9262 to provide a secondary low noise output as well as an output current stop in the shutdown mode. Similarly, a 1.8V to 5V LDO output voltage can be set with 2 external resistors. For RT9262A, a low battery detector with 0.86V detection voltage is included. RT9262/A are provided in SOP-8 packages.

RT9262A Maximum Ratings

Supply Voltage.......................................... -0.3V to 7V
LX Pin Switch Voltage................ -0.3V to (V_DD + 0.8V)
LDO Output Voltage............... ....-0.3V to (V_DD + 0.3V)
Other I/O Pin Voltages............... -0.3V to (V_DD + 0.3V)
LX Pin Switch Current ............................................2.5A
EXT Pin Driver Current ..........................................30mA
LBO Current.......................................................... 30mA
Power Dissipation, P_D @ T_A = 25
SOP-8 ..............................................................0.625W
Package Thermal Resistance
SOP-8, ......................................................._JA 160/W
Operating Junction Temperature............................. 150
Storage Temperature Range.................... -65 ~ +150

RT9262A Features

· 1.0V Low Start-up Input Voltage
· High Supply Capability to Deliver 3.3V 100mA with 1V Input Voltage
·17µA Quiescent (Switch-off) Supply Current
· 90% Efficiency
· 550KHz Fixed Switching Rate
· Providing Flexibility for Using Internal and External Power Switches
· Built-in 300mA LDO, also for the Zero-Output- Current Shutdown Mode (RT9262)
· Boost DC-DC Integrating LDO for Up-Down Regulation (RT9262)
· Built-in 0.86V Voltage Detector (RT9262A)
· 8-Pin SOP Package

RT9262A Typical Application

· PDA
· Portable Instrument
· Wireless Equipment
· DSC
· LCD Back Bias Circuit
· RF-Tags

RT9262A Connection Diagram

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