US3027 Datasheet, PDF (2/8 Pages) UNISEM – 5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS TRIPPLE LDO CONTROLLER

US3027
ABSOLUTE MAXIMUM RATINGS
V5 supply Voltage ........................................... 7V
V12 Supply Voltage ............................................ 20V
Storage Temperature Range ................................. -65 TO 150°C
Operating Junction Temperature Range .......... 0 TO 125°C
PACKAGE INFORMATION
28 PIN WIDE BODY PLASTIC SOIC (W)
Drive2 1
Fix 2
VID4 3
VID3 4
VID2 5
VID1 6
VID0 7
PGood 8
SD 9
Vsen2 10
Select 11
SS 12
Fault / Rt 13
Vsen4 14
TOP VIEW
28 V12
27 UGate
26 Phase
25 LGate
24 PGnd
23 OCSet
22 Vsen1
21 Fb
20 V5
19 Vsen3
18 Drive3
17 Gnd
16 NC
15 Drive4
θJA =80°C/W
ELECTRICAL SPECIFICATIONS
Unless otherwise specified ,these specifications apply over ,V12 = 12V, V5 = 5V and Ta=0 to 70°C. Typical values
refer to Ta =25°C. Low duty cycle pulse testing are used which keeps junction and case temperatures equal to the
ambient temperature.
PARAMETER
SYM TEST CONDITION
MIN TYP MAX UNITS
Supply UVLO Section
UVLO Threshold-12V
Supply ramping up
10
V
UVLO Hysterises-12V
0.6
V
UVLO Threshold-5V
Supply ramping up
4.4
V
UVLO Hysterises-5V
0.3
V
Supply Current
Operating Supply Current
V12
6
mA
V5
30
Switching Controllers; Vcore (Vsen 1) and AGP (Vsen 2)
VID Section (Vcore only)
DAC output voltage (note 1)
0.99Vs Vs
1.01Vs V
DAC Output Line Regulation
0.1
%
DAC Output Temp Variation
0.5
%
VID Input LO
0.8
V
VID Input HI
2
V
VID input internal pull-up
resistor to V5
27
kΩ
Vsen2 Voltage
Select<0.8V
1.5
V
Select>2V
3.3
V
4-2
Rev. 1.3
12/8/00