UTC L2800
PARAMETER
LINEAR INTEGRATED CIRCUIT
SYMBOL
Vcc
V
I
V
BR
I
O
+
I
O
-
C
PE
C
P
R
B
R
T
C
T
fosc
Top
RECOMMENDED OPERATING CONDITIONS
(Ta=25°C)
MIN
1.8
-0.2
-0.2
-40
0.1
0.1
390
3.0
270
500
+25
TYP
MAX
15
1.0
Vcc
40
UNIT
V
V
V
mA
mA
µF
µF
Ω
kΩ
pF
kHz
°C
Power Supply Voltage
Error Amplifier Input Voltage
BR/CTL Pin Input Voltage
Output Source Current
Output Sink Current
SCP Pin Capacitance
Phase Compensation Capacitance
Output Current Setting Resistance
Timing Resistance
Timing Capacitance
Oscillation Frequency
Operating Temperature
150
1.0
100
10
-30
5000
10.0
10000
1000
+85
ELECTRICAL CHARACTERISTICS
(Ta=25°C, V
CC
=+2V)
PARAMETER
Circuit to prevent
Reset Voltage
malfuncition at low input
Threshold Voltage
oltage (U.V.L.O)
Soft Start
Charging Current
Voltage at soft start
completion
Short Circuit
Charging Current
Detection(S.C.P.)
Threshold Voltage
Sawtooth Wave
Oscillation Frequency
Oscillator(OSC)
Frequency Input
Stability
Frequency Variation
With Temperature
Error Amplifier
Input Threshold Voltage
V
T
Input Stability
V
T
Variation With
Temperature
Input Bias Current
Voltage Gain
Frequency Bandwidth
Maximum Output
Voltage Range
Output Source Current
Output Sink Current
Idle Period Adjustment
Maximum Duty Cycle
Section
Output Section
Output Voltage
SYMBOL
V
R
V
TH
Ics
Vts
Icpc
V
tPC
fosc
f
dV
f
dT
V
T
V
TdV
V
TdT
I
B
Av
BW
V
OM
+
V
OM
-
I
OM
+
I
OM
-
t
DUTY
V
OH1
V
OH2
V
OL1
V
OL2
I
O
+
I
O
-
R
O
TEST CONDITIONS
MIN
TYP MAX UNIT
0.9
V
V
µA
V
µA
V
kHz
%
%
520
20
1.0
145
mV
mV
%
µA
V/V
MHz
V
V
µA
µA
%
V
V
0.2
0.2
-20
40
V
V
mA
mA
kΩ
1.1
V
SCP
=0V
-1.5
0.7
V
SCP
=0V
R
T
=3.0kΩ, C
T
=270pF
Vcc=2V ~ 15V
Ta=-30°C ~ +85°C
V
FB
=450mV
Vcc=2V ~ 15V
Ta=-30°C ~ +85°C
V
IN
=0V
A
V
=0dB
0.78
V
FB
=0.45V
24
R
T
=3.0kΩ, C
T
=270pF
V
FB
=0.8V
R
B
=390Ω, Io=-15mA
R
B
=750Ω, Vcc=1.8V
Io= -10mA
R
B
=390Ω, Io=15mA
R
B
=750Ω, Vcc=1.8V
Io=10mA
R
B
=390Ω, Vo=0.9V
R
B
=390Ω, Vo=0.3V
65
1.0
0.8
480
-1.5
0.7
400
1.3
-1.0
0.8
-1.0
0.8
500
2
5
500
5
1
-0.2
100
6
0.87
0.05
-40
40
75
1.2
1.0
0.1
0.1
1.5
-0.7
0.9
-0.7
0.9
600
10
-1.0
70
0.2
-24
85
Output Source Current
Output Sink Current
Pull Down Resistance
30
20
-30
60
30
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R121-010,A
UTC-IC [ UNISONIC TECHNOLOGIES ]
