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ADP3207 Datasheet(PDF) 4 Page - ON Semiconductor

Part No. ADP3207
Description  CPU Synchronous Buck Controller
Download  29 Pages
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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ADP3207 Datasheet(HTML) 4 Page - ON Semiconductor

 
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ADP3207
Rev. 1 | Page 4 of 29 | www.onsemi.com
Parameter
Symbol
Conditions
Min
Typ
Max
Units
CURRENT BALANCE AMPLIFIER
Common Mode Range2
VSW(X)CM
−600
+200
mV
Input Resistance
RSW(X)
SWX = 0 V
30
40
60
Input Current
ISW(X)
SWX = 0 V
3
4.5
6
μA
Input Current Matching
ΔISW(X)
SWX = 0 V
−5
+5
%
Zero Current Switching
Threshold Voltage
VDCM(SW1)
In DCM mode, DPRSLP = 3.3 V
−6
mV
Masked Off-Time
tOFFMSKD
Measured from PWM turn-off
350
ns
CURRENT-LIMIT COMPARATOR
ILIMIT Voltage
VILIMIT
RILIMIT = 113 kΩ
1.65
1.7
1.75
V
ILIMIT Current
IILIMIT
RILIMIT = 113 kΩ
−15
μA
Maximum ILIMIT Current2
−60
μA
Current-Limit Threshold Voltage
VCL
VCSREF – VCSCOMP, RILIMIT = 113 kΩ, PSI = 1.05 V
180
192
210
mV
VCSREF – VCSCOMP, RILIMIT = 113 kΩ, 1-phase, (PWM2 =
VCC), PSI = GND
180
192
210
mV
VCSREF – VCSCOMP, RILIMIT = 113 kΩ, 2-phase, (PWM3 =
VCC), PSI = GND
86
96
107
mV
VCSREF – VCSCOMP, RILIMIT = 113 kΩ, 3-phase,
(neither PWM2 = VCC nor PWM3 = VCC), PSI = GND
55
64
72
mV
SOFT START TIMER
SS Current
ISS
During start-up, VSS < 1.7 V
−10
−8
−6
μA
In normal mode, VSS = 2.0 V
−48
μA
In current limit, VSS = 2.0 V
1.5
2
2.5
μA
SS Termination Threshold Voltage
VTH(SS)
During start-up, SS is rising
1.6
1.7
1.8
V
SS Clamp Voltage
In normal mode
2.9
V
Current-Limit Latch-Off Voltage
VILO(SS)
In current limit, SS is falling
1.6
1.7
1.8
V
SOFT TRANSIENT CONTROL
STSET Current
ISOURCE(STSET)
Fast exit from deeper sleep,
DPRSLP = 0 V, STSET = VDAC – 0.3 V
−8
μA
Slow exit from deeper sleep,
DPRSLP = 3.3 V, STSET = VDAC – 0.3 V
−2.5
μA
Slow entry to deeper sleep,
DPRSLP = 3.3 V, STSET = VDAC + 0.3 V
+2.5
μA
Minimum STSET Capacitance2
CSTSET
100
pF
Long Transient Threshold Accuracy
VOS(SSMASK)
VOS(SSMASK) = VSTSET – VDAC
170
mV
SYSTEM INTERFACE CONTROL
INPUTS
PSI and DPRSTP
Input Low Voltage
VIL
0.5
0.3
V
Input High Voltage
VIH
0.7
0.5
V
DPRSLP and EN
Input Low Voltage
VIL
1.3
1.0
V
Input High Voltage
VIH
2.3
1.9
V
THERMAL THROTTLING CONTROL
TTSENSE Voltage Range2
0
5
V
TTSENSE VRTT Threshold Voltage
VCC = 5 V, TTSENSE is falling
2.45
2.5
2.55
V
TTSENSE VRTT Hysteresis
50
95
mV
TTSENSE Bias Current
TTSENSE = 2.6 V
−2
2
μA
VRTT Output Low Voltage
VOL(VRTT)
IVRTT(SINK) = 400 μA
10
500
mV
VRTT Output High Voltage
VOH(VRTT)
IVRTT(SOURCE) = 400 μA
4
5
V


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