mic3808 Micrel Semiconductor, mic3808 Datasheet - Page 4

• Manufacturer Part Number: mic3808
• Description: Mic3808/mic3809 Push-pull Pwm Controller
• Manufacturer: Micrel Semiconductor

MIC3808/3809
Absolute Maximum Ratings
Supply Voltage (I
Supply Current ........................................................... 20mA
OUTA/OUTB Source Current (peak) .......................... –0.5A
OUTA/OUTB Sink Current (peak) ................................ 1.0A
Comp Pin ......................................................................V
Analog Inputs (FB, CS) ........................ –0.3V to V
Junction Temperature .............................. –55°C to +150°C
Storage Temperature ............................... –65°C to +150°C
Lead Temperature (soldering, 10 sec.) ................... +300°C
ESD Rating, Note 3 ...................................................... 2kV
Electrical Characteristics
T
Parameter
Oscillator Section
Oscillator Frequency
Oscillator Amplitude/VDD
Error Amp Section
Input Voltage
Input Bias Current
Open Loop Voltage Gain
COMP Sink Current
COMP Source Current
COMP Clamp Voltage
PWM Section
Maximum Duty Cycle
Minimum Duty Cycle
Current Sense Section
Gain
Maximum Input Signal
CS to Output Delay
CS Source Current
CS Sink Current
Over Current Threshold
COMP to CS Offset
Output Section
OUT Low Level
OUT High Level
Rise Time
Fall Time
MIC3808/3809
A
= T
J
= –40°C to +85°C, V
DD
≤ 10mA) ...................................... +15V
DD
= 10V (Note 9), 1µF capacitor from V
Condition
Note 4
COMP = 2V
(Guaranteed by design)
FB = 2.2V, COMP = 1V
FB = 1.3V, COMP = 3V, Note 5
V
Measured at OUTA or OUTB
COMP = 0V
Note 6 (Guaranteed by design)
Note 7
COMP = 3V, CS from 0 to 600mV
CS = 0.5V, RC = 5.5V, Note 8
CS = 0V
I = 100mA
I = –50mA, V
C
C
FB
L
L
= 1nF
= 1nF
= 0V
NOT TO EXCEED 6V
(Note 1)
DD
- OUT
DD
+0.3V
DD
DD
to GND, R = 22KΩ, C = 330pF.
4
Operating Ratings
V
Oscillator Frequency (f
Ambient Temperature (T
Package Thermal Resistance
DD
SOIC-8 (θ
MSOP-8 (θ
Input Voltage (V
JA
JA
) ...................................................... 160°C/W
) .................................................... 206°C/W
DD
OSC
) ........................................ Note 11
A
) ......................... –40°C to +85°C
(Note 2)
) ....................... 10kHz to 1MHz
–0.15
–200
0.44
1.95
0.45
0.35
Min
180
0.3
3.1
1.9
0.7
–1
60
48
5
–0.5
0.75
Typ
200
0.5
2.5
3.6
2.2
0.5
0.8
0.5
0.5
80
49
70
10
25
25
2
Max
0.56
2.05
0.55
220
200
4.0
2.5
0.8
1.2
50
60
60
1
0
1
1
April 2005
Micrel
Units
kHz
V/V
V/V
mA
mA
mA
µA
dB
nA
ns
ns
ns
%
%
V
V
V
V
V
V
V