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RT9244 Datasheet(PDF) 6 Page - Richtek Technology Corporation

Part No. RT9244
Description  Multi-Phase PWM Controller for CPU Core Power Supply
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Maker  RICHTEK [Richtek Technology Corporation]
Homepage  http://www.richtek.com
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RT9244 Datasheet(HTML) 6 Page - Richtek Technology Corporation

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RT9244
6
DS9244-06 March 2007
www.richtek.com
Absolute Maximum Ratings (Note 1)
Supply Voltage, VCC ------------------------------------------------------------------------------------------- 7V
Input, Output or I/O Voltage ---------------------------------------------------------------------------------- GND-0.3V to VCC+0.3V
Package Thermal Resistance
SOP-32,
θJA ----------------------------------------------------------------------------------------------------- 50°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
Recommended Operating Conditions
(Note 3)
Supply Voltage, VCC ------------------------------------------------------------------------------------------- 5V
± 10%
Ambient Temperature Range --------------------------------------------------------------------------------- 0
°C to 70°C
Junction Temperature Range --------------------------------------------------------------------------------- 0
°C to 125°C
Electrical Characteristics
To be continued
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
VCC Supply Current
Nominal Supply Current
ICC
PWM 1,2,3,4 Open
--
12
--
mA
Power-On Reset
POR Threshold
VCCRTH
VCC Rising
4.0
4.2
4.5
V
Hysteresis
VCCHYS
0.2
0.5
--
V
Trip (Low to High)
VDVDTP
Enable
--
2.0
--
V
VDVD Threshold
Hysteresis
VDVDHYS
--
50
--
mV
Oscillator
Free Running Frequency
fOSC
RRT = 12kΩ
170
200
230
kHz
Frequency Adjustable Range
fOSC_ADJ
50
--
400
kHz
Ramp Amplitude
ΔVOSC
RRT = 12kΩ
--
1.9
--
V
Ramp Valley
VRV
--
1.0
--
V
Maximum On-Time of Each Channel
62
66
75
%
RT Pin Voltage
VRT
R RT = 12kΩ
0.55
0.60
0.65
V
Reference and DAC
VDAC ≥ 1V
−1
--
+1
%
DACOUT Voltage Accuracy
ΔVDAC
VDAC < 1V
−10
--
+10
mV
DAC (VID0-VID4) Input Low
VILDAC
--
--
0.8
V
DAC (VID0-VID4) Input High
VIHDAC
2.0
--
--
V
(VCC = 5V, TA = 25°C, unless otherwise specified)


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