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ADP3198 Datasheet(PDF) 3 Page - Analog Devices

Part # ADP3198
Description  8-Bit Programmable 2- to 4-Phase Synchronous Buck Controller
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADP3198 Datasheet(HTML) 3 Page - Analog Devices

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ADP3198
Rev. A | Page 3 of 32
SPECIFICATIONS
VCC = 5 V, FBRTN = GND, TA = 0°C to 85°C, unless otherwise noted.1
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
4.4
V
Accuracy
VFB
Relative to nominal DAC output, referenced
to FBRTN, LLSET = CSREF (see Figure 2)
−11
+11
mV
VFB(BOOT)
In startup
1.089
1.1
1.111
V
Load Line Positioning Accuracy
CSREF − LLSET = 80 mV
−78
−80
−82
mV
Differential Nonlinearity
−1
+1
LSB
Input Bias Current
IFB
IFB = IIREF
13.5
15
16.5
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
−350
+350
mV
LLSET Input Bias Current
ILLSET
−10
+10
nA
BOOT Voltage Hold Time
tBOOT
CDELAY = 10 nF
2
ms
VID INPUTS
Input Low Voltage
VIL(VID)
VID(X), VIDSEL
0.4
V
Input High Voltage
VIH(VID)
VID(X), VIDSEL
0.8
V
Input Current
IIN(VID)
−1
μA
VID Transition Delay Time
VID code change to FB change
400
ns
No CPU Detection Turn-Off Delay Time
VID code change to PWM going low
5
μs
OSCILLATOR
Frequency Range
fOSC
0.25
4
MHz
Frequency Variation
fPHASE
TA = 25°C, RT = 243 kΩ, 4-phase
156
200
240
kHz
TA = 25°C, RT = 113 kΩ, 4-phase
400
kHz
TA = 25°C, RT = 51 kΩ, 4-phase
800
kHz
Output Voltage
VRT
RT = 243 kΩ to GND
1.9
2.0
2.1
V
RAMPADJ Output Voltage
VRAMPADJ
RAMPADJ − FB
−50
+50
mV
RAMPADJ Input Current Range
IRAMPADJ
1
50
μA
CURRENT SENSE AMPLIFIER
Offset Voltage
VOS(CSA)
CSSUM − CSREF (see Figure 3)
−2
+2
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
IMON Output
IMON
10 × (CSREF − CSCOMP) > 50 mV
−6
+6
%
CURRENT BALANCE AMPLIFIER
Common-Mode Range
VSW(X)CM
−600
+200
mV
Input Resistance
RSW(X)
SW(X) = 0 V
10
17
26
Input Current
ISW(X)
SW(X) = 0 V
8
12
20
μA
Input Current Matching
∆ISW(X)
SW(X) = 0 V
−5
+5
%
CURRENT LIMIT COMPARATOR
ILIMIT Bias Current
IILIMIT
IILIMIT = 2/3 × IIREF
9
10
11
μA


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