RT9245A 查看數據表（PDF） - Richtek Technology
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RT9245A Datasheet PDF : 25 Pages
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RT9245A
Absolute Maximum Ratings (Note 1)
z Supply Voltage, VCC ------------------------------------------------------------------------------------------- 7V
z Input, Output or I/O Voltage ---------------------------------------------------------------------------------- GND − 0.3V to VCC + 0.3V
z Package Thermal Resistance
TSSOP-28, θJA -------------------------------------------------------------------------------------------------- 100°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, VCC ------------------------------------------------------------------------------------------- 5V ± 10%
z Ambient Temperature Range --------------------------------------------------------------------------------- 0°C to 70°C
z Junction Temperature Range --------------------------------------------------------------------------------- 0°C to 125°C
Electrical Characteristics
(VCC = 5V, TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Units
VCC Supply Current
Nominal Supply Current
Power-On Reset
POR Threshold
Hysteresis
VDVD Threshold
Trip (Low to High)
Hysteresis
Oscillator
Free Running Frequency
Frequency Adjustable Range
Ramp Amplitude
Ramp Valley
Maximum Duty of Each Channel
RT Pin Voltage
Reference and DAC
DACOUT Voltage Accuracy
DAC (VID0-VID125) Input Low
DAC (VID0-VID125) Input High
ICC
PWM 1,2,3,4 Open
VCCRTH
VCCHYS
VDVDTP
VDVDHYS
VCC Rising
Enable
fOSC
fOSC_ADJ
ΔVOSC
VRV
RRT = 20kΩ
RRT = 20kΩ
VRT
RRT = 20kΩ
ΔVDAC
VILDAC
VIHDAC
VDAC ≥ 1V
VDAC < 1V
VRD 10.x
K8
VRD 10.x
K8
--
12 16 mA
4.0 4.2 4.5 V
0.2 0.5 --
V
0.94 1.0 1.06 V
--
50
-- mV
170 200 230 kHz
50
-- 400 kHz
--
1.9
--
V
0.7 1.0 --
V
58 64 70 %
0.9 1.0 1.1 V
−1
--
+1
%
−10 -- +10 mV
--
--
0.4
V
--
--
0.8
V
0.8
--
--
V
1.2
--
--
V
To be continued
DS9245A-05 March 2007
www.richtek.com
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