TC1267

Lead Style :
Packaging : Bulk
Product : General Purpose Electrolytic Capacitors
Voltage Rating : 250 Volts
Operating Temperature Range : - 40 C to + 85 C
Termination Style : Axial
Tolerance : - 10 %, + 50 %
Dimensions : 25.4 mm Dia. x 79.38 mm L
Capacitance : 225 uF


Features:

• Glitch Free Transition Between Input Sources
• Automatic Input Source Selection
• External PMOS Bypass Switch Control
• Built-in 5V Detector
• 1% Regulated Output Voltage Accuracy
• 400mA Load Current Capability
• Kelvin Sense Input
• Low Ground Current, Independent of Load





Application

• PCMCIA
• PCI
• Network Interface Cards (NICs)
• Cardbus^TM Technology
• Desktop Computers





Pinout






Specifications

Parameter NameValueMax Input Voltage6Output Voltage (v)3.3Typical Active Current (A)60Typical Dropout Voltage @ Max. lout (mV)300Typical Output Voltage Accuracy (%)1.0Output Capacitor TypeAluminum/Tantalum

Parameter Name	Value
Max Input Voltage	6
Output Voltage (v)	3.3
Typical Active Current (A)	60
Typical Dropout Voltage @ Max. lout (mV)	300
Typical Output Voltage Accuracy (%)	1.0
Output Capacitor Type	Aluminum/Tantalum

Input Supply Voltage (V_IN)............ -0.5V to +7V (Max)
Auxiliary Supply Voltage (V_AUX) ... -0.5V to +7V (Max)
LDO Output Current (I_OUT)..............................400mA
Thermal Impedance
Junction-to-Ambient (_JA).......... 27°C/W for DDPAK
ESD Rating .......................................................... 2 KV
Operating Temperature Range (T_A)..... -5°C to +70°C
Storage Temperature Range (T_STG) .-65°C to +150°C





Description

The TC1267 is an application-specific, low dropout regulator (LDO) specifically intended for use in PCI peripheral card applications complying with PCI Power Management (PCI 2.0). It provides an uninterrupted, 3.3V output voltage when the main (5V) or auxiliary (3.3V) input voltage supplies are present. The TC1267 consists of an LDO, a voltage threshold detector, external switchover logic and gate drive circuitry. It functions as a conventional LDO as long as the voltage on the main supply input (VIN) is above the lower threshold (3.90V typ). Should the voltage on VIN fall below the lower threshold the LDO is disabled, and an external P-channel MOSFET is automatically turned on, connecting the auxiliary supply input to VOUT, and ensuring an uninterrupted 3.3V output. The main supply is automatically selected if both the main and auxiliary input supplies are present, and transition from one input supply to the other is guaranteed glitch-free. High integration, automatic secondary supply switchover, Kelvin sensing, and small size make the TC1267 the optimum LDO for PCI 2.0 applications.

The TC1267 is an application-specific, low dropout regulator (LDO), specifically intended for use in PCI peripheral card applications complying with PCI Power Management (PCI 2.0). It provides an uninterrupted, 3.3V output voltage when the main (5V) or auxiliary (3.3V) input voltage supplies are present.

The TC1267 consists of an LDO, a voltage threshold detector, external switchover logic and gate drive circuitry. It functions as a conventional LDO as long as the voltage on the main supply input (V_IN) is above the lower threshold (3.90V typical). Should the voltage on V_IN fall below the lower threshold, the LDO is disabled and an external P-channel MOSFET is automatically turned on, connecting the auxiliary supply input to V_OUT, and ensuring an uninterrupted 3.3V output. The main supply is automatically selected, if both the main and auxiliary input supplies are present, and transition from one input supply to the other is ensured glitchfree. High integration, automatic secondary supply switchover, Kelvin sensing, and small size make the TC1267 the optimum LDO for PCI 2.0 applications.

Parameters:

Technical/Catalog Information	TC1267
Vendor	Cornell Dubilier Electronics (CDE)
Category	Capacitors
Capacitance	225F
ESR (Equivalent Series Resistance)	220.0 mOhm
Features	General Purpose
Lifetime @ Temp.	1000 Hrs @ 85°C
Maximum Temperature	-40°C ~ 85°C
Size / Dimension	1.000" Dia x 3.125" H (25.40mm x 79.38mm)
Lead Spacing	-
Surface Mount Land Size	-
Mounting Type	Through Hole
Package / Case	Axial
Packaging	Bulk
Tolerance	±20%
Voltage Rating	250V
Lead Free Status	Contains Lead
RoHS Status	RoHS Non-Compliant
Other Names	TC1267 TC1267