Datasheet

UC2827-1, UC2827-2
UC3827-1, UC3827-2
www.ti.com SLUS365D –APRIL 1999– REVISED APRIL 2011
ABSOLUTE MAXIMUM RATINGS
(1)
UC2827-1
UC2827-2
UNITS
UC3827-1
UC3827-2
Supply voltage, VCC 20
CEAO, CEA+, CEA-, CSAO, CSA+, CSA-, CT, DELAY, PUSH, PULL,
–0.3 to 5
RAMP, RT, SS, SYNC, VEA+, VEAO,
V
Input voltage range
V+ and BUCK 90
SRC 90-VCC
I/O continuous ±250 mA
BUCK driver
I/O peak ±1 A
I/O continuous ±200 mA
PUSH/PULL driver
I/O peak ±0.8 A
Storage temperature –65 to 150
Junction temperature –55 to 150 °C
Lead temperature (soldering, 10 sec) 300
(1) Voltages are referenced to ground. Currents are positive into, negative out of the specified terminal. Consult Packaging section of
databook for thermal limitations and considerations of packages.
ELECTRICAL CHARACTERISTICS
Unless otherwise spsecified, V
VCC
= 15 V, V
V+
= 14.3 V, C
CT
= 340 pF, R
RT
= 10 kΩ, R
DELAY
= 24.3 kΩ, V
SRC
= V
GND
= V
BUCK
=
V
PUSH
= V
PULL
outputs no load, T
J
= T
A
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY
VCC UVLO, Turn-on 8.3 8.8 9.5 V
Hysteresis 0.9 1.2 1.5 V
I
VCC
Supply current start V
VCC
= 8 V 1000 µA
I
VCC
Supply current run 32 45 mA
I
V+
buck high 0.2 1 2 mA
VOLTAGE ERROR AMPLIFIER
IB 0.5 3 µA
VIO 10 mV
AVOL 80 95 dB
GBW
(1)
Gain bandwidth 1 4 MHz
V
OL
Low-level output voltage I
VEAO
= 0 µA (No load) 0.3 0.5 V
V
OH
High-level output voltage I
VEAO
= 0 µA (No load) 2.85 3 3.20 V
CURRENT SENSE AMPLIFIER
IB –1 –5 µA
VIO 5 mV
AVOL 80 110 dB
GBW
(1)
Gain bandwidth 15 29 MHz
V
OL
Low-level output voltage I
CEAO
= 0 µA (No load) 0.25 0.5 V
V
OH
High-level output voltage I
CEAO
= 0 µA (No load) 3 3.3 V
CMRR Common mode range
(1)
-0.3 2 V
(1) Ensured by design. Not production tested.
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