RT8855 데이터 시트보기 (PDF) - Richtek Technology
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RT8855 Datasheet PDF : 18 Pages
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RT8855
Parameter
Symbol
PWROK Input High Threshold VPOKHI
PWROK Input Low Threshold VPOKLO
VID5 to VID0 Rising Threshold VVID5 to 0
VID5 to VID0 Hysteresis
V VID5 to 0 HYS
VID5 to VID0 Pull-Down
Current
IVID5 to 0
Reference Voltage accuracy
DAC Accuracy
Error Amplifier
DC Gain
Gain-Bandwidth
Slew Rate
Output Voltage Range
Power Good
Over-Voltage Threshold
ADC
GBW
SR
V COM P
VPGOOD-OV
Test Conditions
PWROK Rising
PWROK Falling
VID5 to VID0 Rising
VID5 to VID0 Falling
VVID5 to 0 = 1.5V
1V to 1.55V
0.8V to 1V
0.5V to 0.8V
No Load
CLOAD = 10pF
CLOAD = 10pF
RLOAD = 47kΩ
FB Rising
Under-Voltage Threshold
V PGO OD-U V
FB Falling
Over-Voltage Threshold_NB VPGOOD-OV_NB FB_NB Rising
Under-Voltage Threshold_NB VPGOOD-UV_NB FB_NB Falling
Power Good Low Voltage
Current Sense Amplifier
Max Current
Input Offset Voltage
Oscillator
Running Frequency
Ramp Amplitude
Soft Start
Soft Start Slew Rate
VID change Slew Rate
Protection
Over-Voltage Threshold
VPGOOD
IG MM AX
VOSCS
fOSC
V RAM P
SRSS
SRVID
VOVP
VOVP_NB
IPGOOD = 4mA
VCSP = 1.3V
Sink Current from CSN
RRT = 40kΩ
Slew Rate
Slew Rate
Sweep FB Voltage
Sweep FB_NB Voltage
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8
Min
Typ
Max Unit
2
--
--
V
--
--
0.8
V
0.75
0.8
0.85
V
--
25
--
mV
--
16
30
uA
−0.5
--
+0.5 %
−8
--
+8
mV
−10
--
+10 mV
--
80
--
dB
--
10
--
MHz
10
--
--
V/us
0.5
--
3.6
V
VDAC VDAC VDAC
V
+210mV +240mV +270mV
VDAC VDAC VDAC
V
−330mV −300mV −270mV
VDAC VDAC VDAC
V
+210mV +240mV +270mV
VDAC VDAC VDAC
V
−330mV −300mV −270mV
--
--
0.4
V
100
--
−2
0
--
uA
+2
mV
270
300
330 kHz
--
1.6
--
V
2.5
3.25
2.5
3.25
4 mV/us
4 mV/us
1.7
1.8
1.9
V
1.7
1.8
1.9
V
To be continued
DS8855-01 April 2011
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