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RT8800A Datasheet(PDF) 5 Page - Richtek Technology Corporation

Part No. RT8800A
Description  General Purpose 3-Phase PWM Controller for High-Density Power Supply
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Maker  RICHTEK [Richtek Technology Corporation]
Homepage  http://www.richtek.com
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RT8800A Datasheet(HTML) 5 Page - Richtek Technology Corporation

 
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RT8800A
5
DS8800A-04 August 2007
www.richtek.com
All brand name or trademark belong to their owner respectively
Absolute Maximum Ratings
(Note 1)
Supply Voltage, VDD ------------------------------------------------------------------------------------------- 7V
Input, Output or I/O Voltage ---------------------------------------------------------------------------------- GND
− 0.3V to VDD+ 0.3V
Power Dissipation, PD @ TA = 25
°C
VQFN-16L 3x3 -------------------------------------------------------------------------------------------------- 1.47W
Package Thermal Resistance (Note 4)
VQFN-16L 3x3,
θJA --------------------------------------------------------------------------------------------- 68°C/W
Junction Temperature ------------------------------------------------------------------------------------------ 150
°C
Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------- 260
°C
Storage Temperature Range ---------------------------------------------------------------------------------
−65°C to 150°C
ESD Susceptibility (Note 2)
HBM (Human Body Mode) ----------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------- 200V
Electrical Characteristics
(VDD = 5V, TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
VDD Supply Current
Nominal Supply Current
IDD
PWM 1,2,3 Open
--
5
--
mA
Power-On Reset
Rising
4.0
4.2
4.5
V
VDD Threshold
Hysteresis
0.2
0.5
--
V
DVD Rising Threshold
0.75
0.8
0.85
V
DVD Hysteresis
--
65
--
mV
Oscillator
Free Running Frequency
fOSC
RRT = 16kΩ
170
200
230
kHz
Frequency Adjustable Range
fOSC_ADJ
50
--
400
kHz
Ramp Amplitude
ΔVOSC
RRT = 16kΩ
--
1.7
--
V
Ramp Valley
VRV
--
1.0
--
V
Maximum On-Time of Each Channel
62
66
75
%
RT Pin Voltage
VRT
RRT = 16kΩ
0.77
0.82
0.87
V
Reference Voltage
IMAX Reference Voltage
VIMAX
RIMAX = 16kΩ
0.75
0.8
0.85
V
VID125 Reference Voltage
VVID125
RVID125 = 16kΩ
0.75
0.8
0.85
V
Recommended Operating Conditions
(Note 3)
Supply Voltage, VDD ------------------------------------------------------------------------------------------- 5V
± 10%
Ambient Temperature Range --------------------------------------------------------------------------------- 0
°C to 70°C
Junction Temperature Range --------------------------------------------------------------------------------- 0
°C to 125°C
To be continued


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