AP2004 Datasheet, PDF (3/8 Pages) Anachip Corp – PWM Buck Controller

PWM Buck Controller
AP2004
„ Recommended Operating Conditions
Symbol
V_CC
V_I
V_O
I_FB
R_F
C_T
F_OSC
T_OP
Parameter
Supply voltage
Amplifier input voltage
Collector output voltage
Current into feedback terminal
Feedback resistor
Timing capacitor
Oscillator frequency
Operating free-air temperature
Min.
3.6
1.05
100
100
10
-20
„ Electrical Characteristics (TA=25ºC, VCC=6V, f=200 Khz)
Reference (REF)
Symbol
Parameter
Conditions
Comp connect to FB
V_REF
Output voltage change with
temperature
Under voltage lockout (UVLO)
T_A = -20ºC ~ 25ºC
T_A = 25ºC ~ 85ºC
Symbol
Parameter
Conditions
V_UT
Upper threshold voltage (V_CC)
V_LWT
Lower threshold voltage (V_CC)
V_HT
Hysteresis (V_CC)
Short-circuit protection (SCP) control
I_O(REF) = 0.1mA
T_A = 25ºC
Symbol
Parameter
Conditions
V_IT
Input threshold voltage
V_STB
Standby voltage
V_LT
Latched input voltage
I_SCP
Input (source) current
V_CT
Comparator threshold voltage
(COMP)
Oscillator (OSC)
T_A = 25ºC
No pull up
No pull up
V_I = 0.7V, T_A = 25ºC
Symbol
Parameter
Conditions
F_OSC
∆F_OSC
Frequency
Standard deviation of frequency
Frequency change with voltage
C_T =270 pF
C_T =270 pF
V_CC=3.6V ~ 20V
Max.
Unit
27
V
1.45
V
Vcc-1.5
V
45
µA
kΩ
6800
pF
300
KHz
85
ºC
Min.
1.225
Typ.
1.25
-0.1
-0.2
Max. Unit
1.275 V
±1 %
±1 %
Min.
Typ.
2.9
2.4
500
Max. Unit
V
V
mV
Min.
0.60
100
-10
Typ.
0.67
130
50
-15
1.5
Max. Unit
0.75 V
160 mV
100 mV
-20 µA
V
Min.
Typ.
200
10
1
Max. Unit
KHz
%
Anachip Corp.
www.anachip.com.tw
Rev. 0.4 Apr 6, 2004
3/8