RT8802A
Absolute Maximum Ratings (Note 1)
z Supply Voltage, VDD ------------------------------------------------------------------------------------------- 7V
z Input, Output or I/O Voltage ---------------------------------------------------------------------------------- GND-0.3V to VDD+0.3V
z Power Dissipation, PD @ TA = 25°C
VQFN−40L 6x6-------------------------------------------------------------------------------------------------- 2.857W
z Package Thermal Resistance (Note 4)
VQFN-40L 6x6, θJA --------------------------------------------------------------------------------------------- 35°C/W
z Junction Temperature ------------------------------------------------------------------------------------------ 150°C
z Lead Temperature (Soldering, 10 sec.)-------------------------------------------------------------------- 260°C
z Storage Temperature Range --------------------------------------------------------------------------------- −65°C to 150°C
z ESD Susceptibility (Note 2)
HBM (Human Body Mode) ----------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 3)
z Supply Voltage, VDD ------------------------------------------------------------------------------------------- 5V 10%
z Junction Temperature Range--------------------------------------------------------------------------------- −40°C to 125°C
z Ambient Temperature Range--------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VDD = 5V, TA = 25°C, unless otherwise specified)
Parameter
Supply Current
Symbol
Test Conditions
Min
Typ
Max Units
V
DD
Nominal Supply Current
Power-On Reset
POR Threshold
Hysteresis
I
PWM 1,2,3,4,5 Open
--
12
16
mA
DD
V
V
V
V
V
V
V
Rising
DD
4.0
0.2
0.9
--
4.2
0.5
1.0
60
4.5
--
V
V
DDRTH
DDHYS
DVDTH
DVDHYS
TTTH
Trip (Low to High)
Hysteresis
Enable
Enable
1.1
--
V
V
DVD
Threshold
mV
Trip (Low to High)
Hysteresis
0.75
--
0.85
0.1
0.95
--
V
TT
Threshold
V
TTHYS
Oscillator
Free Running Frequency
Frequency Adjustable Range
Ramp Amplitude
f
R
R
= 20kΩ
180
50
200
--
220
400
--
kHz
kHz
V
OSC
RT
RT
f
OSC_ADJ
ΔV
= 20kΩ
--
1.9
1.0
50
1.0
OSC
Ramp Valley
V
0.7
45
--
V
RV
Maximum On-Time of Each Channel
RT Pin Voltage
Four Phase Operation
= 20kΩ
55
1.1
%
V
R
0.9
V
RT
RT
To be continued
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16
DS8802A-04 August 2007
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
