RT8805
Absolute Maximum Ratings
PHASE to GND
Preliminary
(Note 1)
Supply Voltage, V
CC
--------------------------------------------------------------------------------------------------
−0.3V
to 16V
DC -------------------------------------------------------------------------------------------------------------------------
−5V
to 15V
< 200ns ------------------------------------------------------------------------------------------------------------------
−10V
to 30V
BOOT to PHASE ------------------------------------------------------------------------------------------------------ 15V
BOOT to GND
DC -------------------------------------------------------------------------------------------------------------------------
−0.3V
to V
CC
+15V
< 200ns ------------------------------------------------------------------------------------------------------------------
−0.3V
to 42V
Input, Output or I/O Voltage ----------------------------------------------------------------------------------------- GND-0.3V to 7V
Power Dissipation, P
D
@ T
A
= 25°C
VQFN−16L 3x3 --------------------------------------------------------------------------------------------------------- 1.47W
Package Thermal Resistance (Note 4)
VQFN−16L 3x3,
θ
JA
--------------------------------------------------------------------------------------------------- 68°C/W
Junction Temperature ------------------------------------------------------------------------------------------------- 150°C
Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------- 260°C
ESD Susceptibility (Note 2)
HBM (Human Body Mode) ------------------------------------------------------------------------------------------ 1.5kV
MM (Machine Mode) -------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions
(Note 3)
Supply Voltage --------------------------------------------------------------------------------------------------------- 9V to 14V
Junction Temperature Range ----------------------------------------------------------------------------------------
−20°C
to 70°C
Electrical Characteristics
(V
IN
= 12V, T
A
= 25°C, unless otherwise specified)
Parameter
Supply Input
Power Supply Voltage
Power On Reset
Power On Reset Hysteresis
Power Supply Current
Soft Start
Soft Start Current
Oscillator
Free Running Frequency
Frequency Variation
Frequency Range
Maximum Duty Cycle
f
OSC
RT = 33kΩ
255
-15
50
70
300
--
300
75
345
15
1000
80
kHz
%
kHz
%
I
SS
8
10
15
μA
I
VCC
V
SS
= 0V
V
CC
V
CC
--
5.4
--
--
12
5.9
0.3
10
15
6.5
--
--
V
V
V
mA
Symbol
Test Conditions
Min
Typ
Max
Units
To be continued
www.richtek.com
4
DS8805-01
November 2005
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
