AT1380A
Preliminary Product Information
Switching Regulator Controller for LCD Bias
Electrical Characteristics
(VCC=+3.0V, Ta=+250C)
Parameter
Symbol
Condition
Values
Unit
Min. Typ. Max.
VCC Under voltage Reset voltage for
VR
--
1.8 1.9
V
Lockout
falling Vcc. OUT
remains off if Vcc is
below this level.
Startup voltage for
rising Vcc.
(U.V.L.O.)
--
VTH
2.4 2.5 2.6
V
Charging current
ICS
Vts
VSCP=0V
-1.5 -1.0 -0.7
0.7 0.8 0.9
μA
V
Soft start
Voltage at soft start
--
--
completion
Short circuit
Charging current
ICPC
VtPC
fOSC
f∆V
f∆T
VT
VSCP=0V
-1.5 -1.0 -0.7
0.7 0.8 0.9
μA
V
detection (S.C.P.)
Threshold voltage
Oscillation frequency
400 500 600 kHz
RT=3kΩ, CT=270pF
VCC=2.5V to 13.5V
Sawtooth waveform
oscillator (OSC)
Frequency input
--
2
10
%
Stability
Frequency variation
with temperature
Input threshold
Voltage
Ta =-300C to 850C
VFB = 450mV
--
5
--
%
480 500 520 mV
VT input stability
VT variation with
Temperature
VT∆V VCC=2V to 13.5V
VT∆T Ta = -300C to 850C
--
--
5
1
20 mV
--
%
Input bias current
IB
VIN = 0V
-1.0 -0.2 1.0
70 100 145 V/V
μA
Error amplifier
Voltage gain
AV
--
--
Frequency bandwidth
Maximum output
voltage range
BW
AV = 0 dB
--
6
-- MHz
+
VOM
VOM
0.78 0.87 --
-- 0.05 0.2
V
V
μA
μA
%
_
+
Output source current
Output sink current
Maximum duty cycle
IOM
IOM
VFB = 450mV
--
24
75
-40 -24
40
--
_
--
85
Idle period
TDUTY
RT=3.3kΩ, CT=270pF
fOSC = 500KHz
adjustment section
VOH1
VOH2
1.0 1.2
0.8 1.0
--
--
V
V
RB= 390Ω, IO= -15 mA
RB= 750Ω, VCC = 3.0V
IO= -10 mA
Output voltage
Output section
VOL1
VOL2
--
--
0.1 0.2
0.1 0.2
V
V
RB= 390Ω, IO= -15 mA
RB= 750Ω, VCC = 3.0V
IO= -10 mA
+
Output source current
Output sink current
Pull down resistance
IO
--
40
20
-40 -30 mA
70
30
RB= 390Ω, VO = 0.9V
-
IO
--
40
mA
ｋΩ
RB= 390Ω, VO = 0.3V
RO
--
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email: service@aimtron.com.tw
4
AIMTRON [ AIMTRON TECHNOLOGY ]
