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UCC2880DW-5 View Datasheet(PDF) - Texas Instruments

Part NameDescriptionManufacturer
UCC2880DW-5 Pentium® Pro Controller TI
Texas Instruments TI
UCC2880DW-5 Datasheet PDF : 8 Pages
1 2 3 4 5 6 7 8
UCC2880-4/-5/-6
UCC3880-4/-5/-6
DESCRIPTION (cont.)
The voltage and current amplifiers have a 4MHz gain
bandwidth product to satisfy high performance system re-
quirements. The internal current sense amplifier permits
the use of a low value current sense resistor, minimizing
power loss. The oscillator frequency is fixed internally at
100kHz, 200kHz, or 400kHz, depending upon the option
selected. The foldback circuit reduces the converter short
circuit current limit to 50% of its nominal value when the
converter is short circuited. The gate driver is a 2totem
pole output stage capable of driving an external MOSFET.
This device is available in 20-pin dual in-line and surface
mount packages. The UCC2880-x is specified for opera-
tion from –25°C to 85°C, and the UCC3880-x is specified
for operation from 0°C to 70°C.
Pentium® Pro is a registered trademark of Intel Corpora-
tion.
CONNECTION DIAGRAM
SOIC-20 (Top View)
DW Package
ORDERING INFORMATION
Consult factory for temperature range or package options
not shown.
UCC3880-4
UCC3880-5
UCC3880-6
Frequency Gain Table
100kHz
X
Frequency
200kHz
X
400kHz
X
ELECTRICAL CHARACTERISTICS: Unless otherwise specified, VIN = 12V, VSENSE = 3.5V, VENBL = 5V, VD0 = VD1 = VD2
= VD3 = 0V, 0°C < TA < 70°C, TA = TJ.
PARAMETER
Undervoltage Lockout
VIN UVLO Turn-on Threshold
VIN UVLO Turn-off Threshold
UVLO Threshold Hysteresis
Supply Current
lIN
DAC/Reference
COMMAND Voltage Accuracy
D0-D3 Voltage High
D0-D3 Input Bias Current
VREF Output Voltage
VREF Load Regulation
VREF Sourcing Current
TEST CONDITIONS
10.8V < VIN < 13.2V, IVREF = 0mA
DX Pin Floating
DX Pin Tied to GND
IVREF = 0mA to 5mA
VREF = 0V
MIN TYP MAX UNITS
10.5 10.8 V
9.5 10
V
500
mV
3.5
mA
–1
1
%
5
V
–70 –20 µA
4.975 5 5.025 V
–10 0
mV
10
mA
OVP Comparator
Trip Point
% Over COMMAND Voltage
10 15 20 %
Hysteresis
VSENSE Input Bias Current
Propagation Delay
OV, OVP, UV Combined
20 30 mV
–0.1
µA
1
µs
2
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