Datasheet
UCC28019A
SLUS828B – DECEMBER 2008 – REVISED APRIL 2009 ..................................................................................................................................................
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ELECTRICAL CHARACTERISTICS (continued)
Unless otherwise noted, VCC=15 V
DC
, 0.1 µ F from VCC to GND, -40 ° C ≤ T
J
= T
A
≤ 125 ° C. All voltages are with respect to
GND. Currents are positive into and negative out of the specified terminal.
PARAMETER TEST CONDITION MIN TYP MAX UNITS
Current Loop
g
mi
Transconductance gain T
A
= 25 ° C 0.75 0.95 1.15 mS
Output linear range
(2)
± 50 µ A
ICOMP voltage during OLP VSENSE = 0.5 V 3.7 4 4.3 V
Voltage Loop
V
REF
Reference voltage -40 ° C ≤ T
A
≤ 125 ° C 4.9 5 5.1 V
g
mv
Transconductance gain without EDR -31.5 -42 -52.5
µ S
g
mv-EDR
Transconductance gain under EDR VSENSE = 4.65 V -440
Maximum sink current under normal
VSENSE = 6 V, VCOMP = 4 V 21 30 38
operation
Source current under soft start VSENSE = 4 V, VCOMP = 2.5 V -21 -30 -38
µ A
VSENSE = 4 V, VCOMP = 2.5 V -300
Maximum source current under EDR
operation
VSENSE = 4 V, VCOMP = 4 V -170
Enhanced dynamic response VSENSE
4.63 4.75 4.87 V
low threshold, falling
(2)
VSENSE input bias current VSENSE = 5 V 20 100 250 nA
VCOMP voltage during OLP VSENSE = 0.5 V, I
VCOMP
= 0.5 mA 0 0.2 0.4 V
VCOMP rapid discharge current VCOMP = 3 V, VCC = 0 V 0.77 mA
V
PRECHARGE
VCOMP precharge voltage I
VCOMP
= -100 µ A, VSENSE = 5 V 1.76 V
I
PRECHARGE
VCOMP precharge current VCOMP = 1.0 V -1 mA
VSENSE threshold, end of soft start Initial start up 4.95 V
GATE Driver
GATE current, peak, sinking
(2)
C
GATE
= 4.7 nF 2
A
GATE current, peak, sourcing
(2)
C
GATE
= 4.7 nF -1.5
GATE rise time C
GATE
= 4.7 nF, GATE = 2 V to 8 V 8 40 60
ns
GATE fall time C
GATE
= 4.7 nF, GATE = 8 V to 2 V 8 25 40
GATE low voltage, no load I
GATE
= 0 A 0 0.05
GATE low voltage, sinking I
GATE
= 20 mA 0.3 0.8
GATE low voltage, sourcing I
GATE
= -20 mA -0.3 -0.8
VCC = 5 V, I
GATE
= 5 mA 0.2 0.75 1.2
GATE low voltage, sinking, device OFF
V
VCC = 5 V, I
GATE
= 20 mA 0.2 0.9 1.5
VCC = 20 V, C
GATE
= 4.7 nF 11.0 12.5 14.0
VCC = 11 V, C
GATE
= 4.7 nF 9.5 10.5 11.0
GATE high voltage
VCC = VCC
OFF
+ 0.2 V, C
GATE
=
8.0 9.4 10.2
4.7 nF
(2) Not production tested. Characterized by design.
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