Datasheet

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SLUS495H − SEPTEMBER 2001 − REVISED AUGUST 2007
4
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electrical characteristics V
DD
= 12 V, 0°C < T
A
< 70°C for the UCC39002, −40°C < T
A
< 105°C for the
UCC29002 and UCC29002/1, T
A
= T
J
(unless otherwise noted) (continued)
error amplifier
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
V
OH
High-level output voltage I
OUT_EAO
= 0 mA 3.50 3.65 3.80 V
g
M
Transconductance I
EAO
= ± 50 µA 14 mS
I
OH
High-level output current V
LS
− V
CSO
= 0.4 V, R
EAO
= 2.2 kΩ 0.70 0.85 1.00 mA
ADJ buffer
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
V
IO
Input offset voltage
(2)
V
ADJ
= 1.5 V, V
EAO
= 0 V, −60 mV
I
SINK
Sink current V
ADJ
= 5.0 V, V
EAO
= 0 V 0 5 10 µA
T
A
= 25_C
V = 5.0 V, V = 2.0 V
3.60 3.95 4.30
I
SINK
Sink current
0_C ≤ T
A
≤ 70_C
V
ADJ
= 5.0 V, V
EAO
= 2.0 V
LS = floating
3.45 3.95 4.45
mA
I
SINK
Sink current
−40_C ≤ T
A
≤ 105_C
LS = floating
3.35 3.95 4.55
mA
(1) Enables the load share bus at start-up.
(2) Ensured by design. Not production tested.
TERMINAL FUNCTIONS
TERMINAL
I/O
DESCRIPTION
NAME NO.
I/O
DESCRIPTION
ADJ 5 O
Adjust amplifier output. This is the buffered output of the error amplifier block to adjust output
voltage of the power supply being controlled. This pin must always be connected to a voltage
equal to or greater than V
EAO
+ 1 V.
CS− 1 I Current sense amplifier inverting input.
CS+ 2 I Current sense amplifier non-inverting input.
CSO 8 O Current sense amplifier output.
EAO 6 O Output for load share error amplifier. (Transconductance error amplifier.)
GND 4 −
Ground. Reference ground and power ground for all device functions. Return the device to the
low current sense− path of the converter.
LS 7 I/O Load share bus. Output of the load share bus driver amplifier.
VDD 3 I
Power supply providing bias to the device. Bypass with a good quality, low ESL 0.1-µF to 1-µF,
maximum, capacitor as close to the VDD pin and GND as possible.