AA18380
Agamem Microelectronics Inc.
PRELIMINARY
Switching Regulator Controller
■ELECTRICAL CHARACTERISTICS
(VCC = +2 V, Ta = +25° C)
Value
Unit
Parameter
Symbol
Condition
Min
Typ
Max
Circuit to prevent
malfunction at low
Reset voltage
VR
—
—
0.9
V
V
—
input voltage
(U.V.L.O.)
Threshold voltage
Charging current
VTH
ICS
1.1
1.3
1.5
VSCP = 0 V
–1.5 –1.0 –0.7 µ A
0.7 0.8 0.9
–1.5 –1.0 –0.7 µ A
Soft start
Voltage at soft start
completion
VtS
—
—
V
Charging current
Threshold voltage
ICPC
VSCP = 0 V
Short circuit
detection (S.C.P.)
VtPC
0.7
0.8
0.9
V
Oscillation
frequency
fOCS
fdV
RT = 3.0 kΩ , CT = 270 pF 400
500
600 kHz
Frequency input
stability
Sawtooth wave
oscillator (OSC)
VCC = 2 V to 15 V
—
—
2
5
10
—
%
%
Frequency variation
with temperature
fdT
Ta = –30°C to +85°C
Input threshold
voltage
VT
VFB = 450 mV
480
—
500
5
520
20
mV
mV
%
VT input stability
VTdV
VTdT
VCC = 2 V to 15 V
Ta = –30°C to +85°C
VT variation with
temperature
—
1
—
Input bias current
Voltage gain
IB
VIN = 0 V
—
–1.0 –0.2
1.0
µ A
AV
70
—
100
6
145 V/V
Frequency
bandwidth
BW
AV = 0 dB
—
—
MHz
VOM+
VOM –
0.78 0.87
—
V
V
Error amplifier
Maximum output
voltage range
—
—
24
0.05
–40
40
0.2
Output source
current
IOM+
IOM –
–24 µ A
VFB = 0.45 V
Output sink current
—
µ A
Idle period
adjustment
section
RT = 3.0 kΩ , CT = 270 pF
VFB = 0.8 V
Maximum duty cycle
tDUTY
65
75
85
%
4
©Copyright Agamem Microelectronics Inc.
www.agamem.com.tw
2007/1/15
AGAMEM [ AGAMEM MICROELECTRONIC INC. ]
