RT9245 View Datasheet(PDF) - Richtek Technology
Part Name
Description
Manufacturer
RT9245 Datasheet PDF : 22 Pages
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RT9245
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 On-Time of Each Channel
RT Pin Voltage
Reference and DAC
DACOUT Voltage Accuracy
DAC (VID0-VID125) Input Low
DAC (VID0-VID125) Input High
DAC (VID0-VID125) Bias Current
VOSS Pin Voltage
ICC
PWM 1,2,3,4 Open
VCCRTH
VCCHYS
VDVDTP
VDVDHYS
VCC Rising
Enable
fOSC
fOSC_ADJ
ΔVOSC
VRV
RRT = 32kΩ
RRT = 32kΩ
VRT
RRT = 32kΩ
ΔVDAC
VILDAC
VIHDAC
IBIAS_DAC
VVOSS
VDAC ≥ 1V
VDAC < 1V
RVOSS = 100kΩ
--
12 16 mA
4.0 4.2 4.5 V
0.2 0.5 --
V
1.1 1.2 1.3
V
--
50
-- mV
170 200 230 kHz
50
-- 400 kHz
--
1.9
--
V
0.7 1.0 --
V
62
66
75
%
1.4 1.60 1.8
V
−1
--
+1 %
−10 -- +10 mV
--
-- 0.4 V
0.8
--
--
V
25 50 75 μA
1.5 1.65 1.8
V
To be continued
DS9245-06 March 2007
www.richtek.com
7
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