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ADP3197 Datasheet(PDF) 3 Page - Analog Devices

Part No. ADP3197
Description  6-Bit Programmable 2-/3-Phase Synchronous Buck Controller
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADP3197 Datasheet(HTML) 3 Page - Analog Devices

 
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ADP3197
Rev. 0 | Page 3 of 32
SPECIFICATIONS
VCC = 5 V, FBRTN = GND, TA = 0°C to 85°C, unless otherwise noted1
Table 1.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
REFERENCE CURRENT
Reference Bias Voltage
VIREF
1.5
V
Reference Bias Current
IIREF
RIREF = 100 kΩ
14.25
15
15.75
μA
ERROR AMPLIFIER
Output Voltage Range2
VCOMP
0.05
4.4
V
Accuracy
VFB
Relative to nominal DAC output, referenced to FBRTN,
LLSET = CSREF (see Figure 4)
−10
10
mV
Load Line Positioning Accuracy
CSREF – LLSET = 80 mV
−78
−80
−82
mV
Differential Nonlinearity
−1
+1
LSB
Input Bias Current
IFB
IFB = 0.5 × IIREF
−9
−7.5
−6
μA
FBRTN Current
IFBRTN
65
200
μA
Output Current
ICOMP
FB forced to VOUT – 3%
500
μA
Gain Bandwidth Product
GBW(ERR)
COMP = FB
20
MHz
Slew Rate
COMP = FB
25
V/μs
LLSET Input Voltage Range
VLLSET
Relative to CSREF
−250
+250
mV
LLSET Input Bias Current
ILLSET
−10
+10
nA
VID INPUTS
Input Low Voltage
VIL(VID)
VIDx, VIDSEL
0.6
V
Input High Voltage
VIH(VID)
VIDx, VIDSEL
1.4
V
Input Current
IIN(VID)
−10
μA
VID Transition Delay Time2
VID code change to FB change
400
ns
OSCILLATOR
Frequency Range2
fOSC
0.25
3
MHz
Frequency Variation
fPHASE
TA = 25°C, RT = 280 kΩ, 3-phase
180
200
220
kHz
TA = 25°C, RT = 130 kΩ, 3-phase
400
kHz
TA = 25°C, RT = 57.6 kΩ, 3-phase
800
kHz
Output Voltage
VRT
RT = 280 kΩ to GND
1.9
2.0
2.1
V
RAMPADJ Output Voltage
VRAMPADJ
RAMPADJ − FB, DAC=1.55 V
−50
+50
mV
RAMPADJ Input Current Range
IRAMPADJ
1
50
μA
CURRENT SENSE AMPLIFIER
Offset Voltage
VOS(CSA)
CSSUM – CSREF (see Figure 5)
−1.0
+1.0
mV
Input Bias Current
IBIAS(CSSUM)
−10
+10
nA
Gain Bandwidth Product
GBW(CSA)
CSSUM = CSCOMP
10
MHz
Slew Rate
CCSCOMP = 10 pF
10
V/μs
Input Common-Mode Range
CSSUM and CSREF
0
3.5
V
Output Voltage Range
0.05
3.5
V
Output Current
ICSCOMP
500
μA
Current Limit Latch-off Delay Time
tOC(DELAY)
CDELAY = 10 nF
8
ms
CURRENT BALANCE AMPLIFIER
Common-Mode Range
VSWxCM
−600
+200
mV
Input Resistance
RSWx
SWx = 0 V
10
17
26
Input Current
ISWx
SWx = 0 V
8
12
20
μA
Input Current Matching
ΔI
SWx
SWx = 0 V
−4
+4
%
CURRENT LIMIT COMPARATOR
ILIMIT Bias Current
IILIMIT
IILIMIT = 2/3 × IIREF
9
10
11
μA
ILIMIT Voltage
VILIMIT
RILIMIT = 121 kΩ (VILIMIT = IILIMIT × RILIMIT)
1.09
1.21
1.33
V


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