SULR1221 Datasheet, PDF (1/17 Pages) Sangdest Microelectronic (Nanjing) Co., Ltd – Ultra LDO 2A Linear Regulator With Adjustable & Bypass Pin

Technical Data
Data Sheet N1579, Rev. -
SULR1221
Ultra LDO 2A Linear Regulator With Adjustable & Bypass Pin
Description:
A low noise, high PSRR and ultra low dropout linear regulator SULR1221 is optimized for low ESR
ceramic capacitors operation with 2A continuous current. The SULR1221 is designed for portable and
wireless devices with demanding performance and space requirements
The SULR1221 offers high precision output voltage of ±2% tolerance. Output voltage can also be
adjusted for those other than the preset values.
A noise bypass pin is available for further reduction of output noise. The bypass pin could be floating
if it’s unnecessary. At 2A load current and 5V output voltage, a 480mV dropout is performed. The
quality of low quiescent current and low dropout voltage makes this device ideal for battery power
applications. The high ripple rejection and low noise of the SULR1221 provide enhanced
performances for critical applications.
In addition, a logic-level shutdown input is included, which reduce supply current to less than 0.01μA
(typ.) in shutdown mode with fast turn-on time less than 100μs. The SULR1221’s current limit and
thermal protection provide protection against any overload condition that would create excessive
junction temperatures.
Features:
• Guaranteed 2A Output Current.
• Fast Response in Line/Load Transient
• Wide Operating Voltage Ranges: 1.8V to 6.0V.
• 0.01μA Shutdown Standby Current
• Low Quiescent Current: 30μA.
• Fixed: 1.8V, 2.5V, 3.3V, 5V Output Voltage.
• Adjustable Output Voltage are available from 0.8~5.5V.
• Low Dropout：550mV at 2A and 3.3V output voltage, 480mV at 2A and 5V output voltage.
• High PSRR：70dB at 1KHz.
• Active Low or High Shutdown Control. Current Limit and Thermal Protection.
• Available in ±2% Output Tolerance.
• Available in SOT-223 & TO-252(3 pin) & SOP- 8 Exposed Pad (Heat Sink) Package.
Applications:
• LCD TV, LCD Monitor, DPF
• Networking
• STB
• DVD, HDD Driver
• Portable AV Equipment
• PC Peripherals
• China - Germany - Korea - Singapore - United States •
• http://www.smc-diodes.com - sales@ smc-diodes.com •