TC1303C

Features:

`Dual-Output Regulator (500mA Buck Regulator and 300mA Low-Dropout Regulator)
`Power-Good Output with 300ms Delay
`Total Device Quiescent Current = 65A, Typ
`Independent Shutdown for Buck and LDO Outputs (TC1303)
`Both Outputs Internally Compensated
`Synchronous Buck Regulator:
-Over 90% Typical Efficiency
-2.0MHz Fixed-Frequency PWM (Heavy Load)
-Low Output Noise
-Automatic PWM to PFM mode transition
-Adjustable (0.8V to 4.5V) and Standard Fixed-Output Voltages (0.8V, 1.2V, 1.5V, 1.8V, 2.5V, 3.3V)
`Low-Dropout Regulator:
-Low-Dropout Voltage=137mV Typ. @ 200mA
-Standard Fixed-Output Voltages
(1.5V, 1.8V, 2.5V, 3.3V)
`Power-Good Function:
-Monitors Buck Output Function (TC1303A)
-Monitors LDO Output Function (TC1303B)
-Monitors Both Buck and LDO Output Func-tions (TC1303C and TC1304)
-300ms Delay Used for Processor Reset
`Sequenced Startup and Shutdown (TC1304)
`Small 10-pin 3X3 DFN or MSOP Package Options
`Operating Junction Temperature Range:
--40 to +125
`Undervoltage Lockout (UVLO)
`Output Short Circuit Protection
`Overtemperature Protection

Application

·Cellular Phones
·Portable Computers
·USB-Powered Devices
·Handheld Medical Instruments
·Organizers and PDAs




Specifications

Parameter NameValueDevice DescriptionLin Reg and Power Mgt CombinationSW Reg OutputFixed or AdjsutableTypical Active Supply (A)38Switching Frequency (kHz)2000Output Current (mA)500Output Voltage (V)0.8 to 4.5Input Voltage Range (V)2.7 to 5.5

Parameter Name	Value
Device Description	Lin Reg and Power Mgt Combination
SW Reg Output	Fixed or Adjsutable
Typical Active Supply (A)	38
Switching Frequency (kHz)	2000
Output Current (mA)	500
Output Voltage (V)	0.8 to 4.5
Input Voltage Range (V)	2.7 to 5.5

Absolute Maximum Ratings
V_IN - A_GND .....................................................................6.0V
All Other I/O................................(A_GND- 0.3V)to (V_IN + 0.3V)
L_X to P_GND............................................-0.3V to (V_IN + 0.3V)
P_GND to A_GND...................................................-0.3V to +0.3V
Output Short Circuit Current ...............................Continuous
Power Dissipation (Note7)..........................Internally Limited
Storage temperature.....................................-65 to +150
Ambient Temp. with Power Applied.................-40 to +85
Operating Junction Temperature...................-40 to +125
ESD protection on all pins (HBM)..................................... 3kV

Notice: Stresses above those listed under 'Maximu Ratings' may cause permanent damage to the device. This i a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

Description

The TC1303C combines a 500mA synchronous buck regulator and a 300mA low-dropout (LDO) regulator with a power-good monitor to provide a highly integrated solution for applications that require multiple supply voltages. The power-good function monitors the outputs of the Buck and LDO regulators.