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ADP3197 データシート(PDF) 4 Page - Analog Devices

部品番号 ADP3197
部品情報  6-Bit Programmable 2-/3-Phase Synchronous Buck Controller
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ホームページ  http://www.analog.com
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ADP3197 データシート(HTML) 4 Page - Analog Devices

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ADP3197
Rev. 0 | Page 4 of 32
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Maximum Output Voltage
3
V
Current Limit Threshold Voltage
VCL
VCSREF − VCSCOMP, RILIMIT = 121 kΩ
80
100
125
mV
Current Limit Setting Ratio
VCL/IILIMIT
82.6
mV/V
DELAY TIMER
Normal Mode Output Current
IDELAY
IDELAY = IIREF
12
15
18
μA
Output Current in Current Limit
IDELAY(CL)
IDELAY(CL) = 0.25 × IIREF
3.0
3.75
4.5
μA
Threshold Voltage
VDELAY(TH)
1.6
1.7
1.8
V
SOFT START
Output Current (Startup)
ISS(STARTUP)
During startup, ISS(STARTUP) = 0.25 × IIREF
3
3.75
4.5
μA
Output Current (DAC Code Change)
ISS(DAC)
DAC code change, ISS(DAC) = 1.25 × IIREF
15
18.75
22.5
μA
ENABLE INPUT
Threshold Voltage
VTH(EN)
750
800
850
mV
Hysteresis
VHYS(EN)
80
100
125
mV
Input Current
IIN(EN)
−1
μA
Delay Time
tDELAY(EN)
EN > 950 mV, CDELAY = 10 nF
2
ms
OD OUTPUT
Output Low Voltage
VOL(OD)
160
500
mV
Output High Voltage
VOH(OD)
4
5
V
OD Pulldown Resistor
60
THERMAL THROTTLING CONTROL
TTSENSE Voltage Range
Internally limited
0
5
V
TTSENSE Bias Current
−135
−123
−111
μA
TTSENSE VRHOT Threshold
Voltage
665
710
755
mV
TTSENSE Hysteresis
50
mV
VRHOT Output Low Voltage
VOL(VRHOT)
IVRHOT(SINK) = −4 mA
150
300
mV
POWER-GOOD COMPARATOR
Overvoltage Threshold
VPWRGD(OV)
Relative to nominal DAC output; DAC = 0.5 V to 1.55 V
200
250
300
mV
Relative to nominal DAC output; DAC = 0.375 V to 0.4785 V
190
250
310
mV
Undervoltage Threshold
VPWRGD(UV)
Relative to nominal DAC output; DAC = 0.5 V to 1.55 V
−300
−250
−200
mV
Relative to nominal DAC output; DAC = 0.375 V to 0.4785 V
−310
−250
−190
mV
Output Low Voltage
VOL(PWRGD)
IPWRGD(SINK) = −4 mA
150
300
mV
Power-Good Delay Time
During Soft Start2
CDELAY = 10 nF
2
ms
VID Code Changing
100
250
μs
VID Code Static
200
ns
Crowbar Trip Point
VCROWBAR
Relative to FBRTN
1.75
1.8
1.85
V
Crowbar Reset Point
Relative to FBRTN
300
mV
PWM OUTPUTS
Output Low Voltage
VOL(PWM)
IPWM(SINK) = −400 μA
160
500
mV
Output High Voltage
VOH(PWM)
IPWM(SOURCE) = +400 μA
4.0
5
V
SUPPLY
VSYSTEM = 12 V, RSHUNT = 340 Ω (see Figure 4)
VCC
VCC
4.65
5
5.55
V
DC Supply Current
IVCC
25
mA
UVLO Turn On Current
6.5
11
mA
UVLO Threshold Voltage
VUVLO
VCC rising
9
UVLO Threshold Voltage
VUVLO
VCC falling
4.1
V
1 All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC).
2 Guaranteed by design or bench characterization; not tested in production.


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