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UCC3830- Datasheet(PDF) 2 Page - Texas Instruments

Part # UCC3830-
Description  5-Bit Microprocessor Power Supply Controller
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

UCC3830- Datasheet(HTML) 2 Page - Texas Instruments

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UCC3830-4/-5/-6
CONNECTION DIAGRAM
SOIC-20 (Top View)
DW Package
ELECTRICAL CHARACTERISTICS: Unless otherwise specified, VIN = 12V, VSENSE = 3.5V, VD0 = VD1 = VD2 = VD3 =
VD4 = 0V, 0°C < TA < 70°C, TA = TJ.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Undervoltage Lockout
VIN UVLO Turn-on Threshold
10.5
10.8
V
VIN UVLO Turn-off Threshold
9.5
10
V
UVLO Threshold Hysteresis
200
500
700
mV
Supply Current
lIN
D0 through D4 = Open
7.5
13.5
mA
DAC/Reference
COMMAND Voltage Accuracy
10.8V < VIN < 13.2V, IVREF = 0mA, 0°C < TA < 70°C
–1
1
%
D0-D4 Voltage High
DX Pin Floating
4
5
5.2
V
D0-D4 Input Bias Current
DX Pin Tied to GND
–100
–70
–20
µA
OVP Comparator
Trip Point
% Over COMMAND Voltage (Note 1), D0 = D1 = D2 = D4
= Open, D3 = GND
10
17.5
25
%
Hysteresis
20
30
mV
VSENSE Input Bias Current
OV, OVP, UV Combined
–0.5
–0.1
0.5
µA
The voltage and current amplifiers have a 3MHz gain
bandwidth product to satisfy high performance system
requirements. The internal current sense amplifier per-
mits the use of a low value current sense resistor, mini-
mizing 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 nomi-
nal value when the converter is short circuited. The gate
driver is a 4
Ω totem pole output stage capable of driving
an external MOSFET.
This device is available in 20-pin dual in-line and surface
mount packages. The UCC3830-x is specified for opera-
tion from 0°C to 70°C.
Pentium
® Pro and Pentium® Pro II are registered trademarks of
Intel Corporation.
DESCRIPTION (cont.)
FREQUENCY TABLE
Frequency
100kHz
200kHz
400kHz
UCC3830-4
X
UCC3830-5
X
UCC3830-6
X
UCC3830
ORDERING INFORMATION
Note: Consult factory for temperature range or package op-
tions not shown.
ABSOLUTE MAXIMUM RATING
Input Supply Voltage VIN . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
D0, D1, D2, D3, D4, VSENSE, VFB, IS+, IS–, CAM Inputs
Maximum Forced Voltage . . . . . . . . . . . . . . . . –0.3V to 5.3V
PWRGOOD Output Maximum Voltage. . . . . . . . . . . . . . . . 5.5V
COMMAND Ouput Maximum Current . . . . . . Internally Limited
Reference Output Current . . . . . . . . . . . . . . . Internally Limited
Storage Temperature . . . . . . . . . . . . . . . . . . . –65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . –55°C to +150°C
Lead Temperature (Soldering, 10 sec.) . . . . . . . . . . . . . +300°C
Currents are positive into negative out of the specified terminal.
Pulse is defined as a less than 10% duty cycle with a maximum
duration of 500 s. Consult Packaging Section of Databook for
thermal limitations and considerations of packages.


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