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SI8251-IM Datasheet(PDF) 9 Page - Silicon Laboratories

Part # SI8251-IM
Description  DIGITAL POWER CONTROLLER
Download  30 Pages
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Manufacturer  SILABS [Silicon Laboratories]
Direct Link  http://www.silabs.com
Logo SILABS - Silicon Laboratories

SI8251-IM Datasheet(HTML) 9 Page - Silicon Laboratories

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Si8250/1/2
Preliminary Rev. 0.8
9
Table 8. DPWM Specifications
TA = –40 to +125 °C, VDD = 2.5 V, SYSCLK = 25 MHz, PLLCLK = 200 MHz unless otherwise specified.
Parameter
Conditions
Min
Typ
Max
Units
Clock Frequency
DPWMSP[4:3] = 00
200
MHz
DPWMSP[4:3] = 01
50
DPWMSP[4:3] = 1x
25
Resolution
No dithering
9
Bits
Dithering enabled
15
Time Resolution
DPWMSP[4:3] = 00
5
ns
DPWMSP[4:3] = 01
20
DPWMSP[4:3] = 1x
40
SYNC Pulse set-up time
SYNC signal minimum LOW time
before positive transition
3—
DPWM
clock cycles
PH Rise, Fall Time
50pF on pin
5
ns
Output Resistance High
IOUT =–5mA
75
Output Resistance Low
IOUT =8mA
40
Shutdown Supply Current
0.1
µA
Table 9. Bandgap Voltage Reference Specs
TA = –40 to +125 °C, VDD = 2.5 V, SYSCLK = 25 MHz, PLLCLK = 200 MHz unless otherwise specified.
Parameter
Conditions
Min
Typ
Max
Units
Output Voltage
1.20
V
Temperature Stability
–1
+1
%
Turn-on Response
(0.01%, 4.7 µF)
6.5
ms
no load
2
µs
Noise
4.7 µF
2
µV (RMS)
Bandgap Current
60
µA
Reference Buffer Current
30
µA
Power supply rejection
50
dB


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