
SLUS473A
–
NOVEMBER 1999
–
REVISED MARCH 2001
2
www.ti.com
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
Supply voltage
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage (VFF,RC,ILIM)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage (FB)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input current (DISCH)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output current (OUT) dc
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Junction temperature, T
J
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature (soldering, 10 sec.)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15 V
7 V
15 V
1 mA
±
20 mA
–
65
°
C to 150
°
C
–
55
°
C to 150
°
C
300
°
C
Stresses beyond those listed under
“
absolute maximum ratings
”
may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under
“
recommended operating conditions
”
is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
All voltages are with respect to GND. Currents are positive into, negative out of the specified terminal. Consult Packaging Section of the
Power
Supply Control Data Book (TI Literature Number SLUD003)
for thermal limitations and considerations of packages.
AVAILABLE OPTIONS
Packaged Devices
TA = TJ
UVLO Option
SOIC-8
Small Outline (D)
PDIP-8
Plastic Dip (P)
MSOP-8
Small Outline
(DGK)
°
°
–
40
C to 85
C
8.8V/8V
UCC25705D
UCC25705P
UCC25705DGK
12V/8V
UCC25706D
UCC25706P
UCC25706DGK
0
°
C to 70
°
C
8.8V/8V
UCC35705D
UCC35705P
UCC35705DGK
12V/8V
UCC35706D
UCC35706P
UCC35706DGK
D (SOIC
–
8) and DGK (MSOP
–
8) packages are available taped and reeled. Add R suffix to device type (e.g.
UCC35705DR) to order quantities of 2500 devices per reel for SOIC-8 and 2000 devices per reel for the MSOP-8.
electrical characteristics, V
DD
= 11 V, V
IN
= 30 V, R
T
= 47 k, R
DISCH
= 400 k, R
FF
= 14 k, C
T
= 220 pF,
C
VDD
= 0.1
μ
F, and no load on the outputs, 0
°
C
≤
T
A
≤
70
°
C for the UCC3570x and –40
°
C
≤
T
A
≤
85
°
C
for the UCC2570x, T
A
= T
J
, (unless otherwise specified)
UVLO section (UCCx5705)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Start threshold
8.0
8.8
9.6
V
Stop threshold
7.4
8.2
9.0
V
Hysteresis
0.3
0.6
1.0
V
UVLO section (UCCx5706)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Start threshold
11.2
12.0
12.8
V
Stop threshold
7.2
8.0
8.8
V
Hysteresis
3.5
4.0
4.5
V
supply current section
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
μ
A
mA
Start-up current
VDD = UVLO start
–
1 V, VDD comparator off
VDD comparator on, oscillator running at 1 MHz
30
90
IDD active
4.2
5.0