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ADP1877ACPZ-R7 Datasheet(PDF) 3 Page - Analog Devices

Part # ADP1877ACPZ-R7
Description  Dual Output Synchronous Buck PWM Controller With Tracking
PDF  32 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADP1877ACPZ-R7 Datasheet(HTML) 3 Page - Analog Devices

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ADP1877
Rev. 0 | Page 3 of 32
SPECIFICATIONS
All limits at temperature extremes are guaranteed via correlation using standard statistical quality control. VIN = 12 V. The specifications
are valid for TJ = −40°C to +125°C, unless otherwise specified. Typical values are at TA = 25°C.
Table 1.
Parameter
Symbol
Conditions
Min
Typ
Max
Units
POWER SUPPLY
Input Voltage
VIN
2.75
14.5
V
Undervoltage Lockout Threshold
INUVLO
VIN rising
2.45
2.6
2.75
V
VIN falling
2.4
2.5
2.6
Undervoltage Lockout Hysteresis
0.1
V
Quiescent Current
IIN
EN1 = EN2 = VIN = 12 V, VFB = VCCO in PWM mode
(no switching)
4.5
5
mA
Shutdown Current
IIN_SD
EN1 = EN2 = GND, VIN = 5.5 V or 14.5 V
100
200
μA
ERROR AMPLIFIER
FB Input Bias Current
IFB
−100
+1
+100
nA
Transconductance
Gm
Sink or source 1 μA, TA = 25 oC
440
550
660
μs
Sink or source 1 μA
385
550
715
μs
TRK1, TRK2 Input Bias Current
ITRK
0 V < VTRK1/TRK2 < 1.5 V
−100
+1
+100
nA
CURRENT SENSE AMPLIFIER GAIN
ACS
Gain resistor connected to DL,
RCSG = 47 kΩ ± 5%
2.4
3
3.6
V/V
Gain resistor connected to DL,
RCSG = 22 kΩ ± 5%
5.2
6
6.9
V/V
Default setting, RCSG = open
10.5
12
13.5
V/V
Gain resistor connected to DL,
RCSG = 100 kΩ ± 5%
20.5
24
26.5
V/V
OUTPUT CHARACTERICTISTICS
Feedback Accuracy Voltage
VFB
TJ = 0
°C to +70°C, V
FB
= 0.6 V
−0.85%
+0.6
+0.85%
V
TJ = −40
°C to +125°C, V
FB
= 0.6 V
−1.5%
+0.6
+1.5%
V
Line Regulation of PWM
ΔVFB/ΔVIN
±0.015
%/V
Load Regulation of PWM
ΔVFB/ΔVCOMP
VCOMP range 0.9 V to 2.2 V
±0.3
%
OSCILLATOR
Frequency
fOSC
RFREQ = 340 kΩ to AGND
170
200
235
kHz
RFREQ = 78.7 kΩ to AGND
744
800
856
kHz
RFREQ = 39.2 kΩ to AGND
1275
1500
1725
kHz
FREQ to AGND
235
300
345
kHz
FREQ to VCCO
475
600
690
kHz
SYNC Input Frequency Range
fSYNC
fSYNC = 2 × fsw; fSYNC = fOSC; the minimum sync
frequency is 1 × the fOSC set by the resistor
400
3000
kHz
SYNC Input Pulse Width
tSYNCMIN
100
ns
SYNC Pin Capacitance to GND
CSYNC
5
pF
LINEAR REGULATOR
VCCO Output Voltage
TA = 25
°C, I
VCCO
= 100 mA
4.8
5.0
5.18
V
TJ = −40
°C to +125°C
4.7
5.0
5.3
V
VCCO Load Regulation
IVCCO = 0 mA to 100 mA,
35
75
mV
VCCO Line Regulation
VIN = 5.5 V to 14.5 V, IVCCO = 20 mA
10
mV
VCCO Current Limit1
VCCO drops to 4 V from 5 V
350
mA
VCCO Short-Circuit Current1
VCCO < 0.5 V
370
400
mA
VIN to VCCO Dropout Voltage2
VDROPOUT
IVCCO = 100 mA, VIN ≤ 5 V
0.33
0.45
V



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