Micrel, Inc.
MIC4827
(1)
Absolute Maximum Ratings
Operating Ratings
(2)
Supply Voltage (V
DD
).................................... +1.8V to +5.5V
Lamp Drive Frequency (f
EL
) ....................... 60Hz to 1000Hz
Switching Transistor Frequency (f
SW
) ........8KHz to 200KHz
Ambient Temperature (T
A
) .......................... –40°C to +85°C
Junction Thermal Resistance
PDIP (θ
JA
) ........................................................206°C/W
Supply Voltage (V
DD
)............................................–0.5 to 6V
Output Voltage (V
CS
) ........................................–0.5 to 100V
Freq. Control Voltage (V
RSW
, V
REL
)....... –0.5 to (V
DD
+ 0.3V)
Power Dissipation @ T
A
= 85°C ..............................200mW
Storage Temperature (T
s
) .........................–65°C to +150°C
EDS Rating
(3)
Electrical Characteristics
(4)
V
IN
= V
DD
= 3.0V; R
SW
= 560KΩ; R
EL
= 1.0MΩ; T
A
= 25°C,
bold
values indicate –40°C< T
A
< +85°C, unless noted.
Symbol
R
DS(ON)
V
CS
V
A
– V
B
V
EN-L
V
EN-H
I
SD
I
VDD
I
CS
I
IN
f
EL
f
SW
D
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended.
4. Specification for packaged product only.
5. Shutdown current is defined as the sum of current going into pin 1, 5, and 6 when the device is disabled.
Parameter
On-resistance of switching
transistor
Output voltage regulation
Output peak-to-peak voltage
Input low voltage (turn-off)
Input high voltage (turn-on)
Shutdown current,
Note 5
Input supply current
Boosted supply current
Input current including inductor
current
V
A
– V
B
output drive frequency
Switching transistor frequency
Switching transistor duty cycle
Condition
I
SW
= 100mA, V
CS
= 85V
V
DD
= 1.8V to 5.5V
V
DD
= 1.8V to 5.5V
V
DD
= 1.8V to 5.5V
V
DD
= 1.8V to 5.5V
R
SW
= LOW; R
EL
= LOW;
V
DD
= 5.5V
R
SW
= HIGH; R
EL
= HIGH;
V
CS
= 85V; V
A
, V
B
OPEN
R
SW
= HIGH; R
EL
= HIGH;
V
CS
= 85V; V
A
, V
B
OPEN
V
IN
= V
DD
= 1.8V
(See Test Circuit)
Min
Typ
3.8
Max
7.0
95
97
190
194
0.5
Units
Ω
V
V
V
V
V
V
85
83
170
166
V
DD
–
0.5
90
180
0.01
21
200
28
285
53
360
66
90
0.1
0.5
75
400
µA
µA
µA
µA
mA
435
79
Hz
kHz
%
July 2009
3
M9999-070709-A
(408) 955-1690
MICREL [ MICREL SEMICONDUCTOR ]
