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FDS8880 数据表(PDF) 4 Page - Analog Devices

部件名 FDS8880
功能描述  Dual 5 A, 20 V Synchronous Step-Down
Download  32 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

FDS8880 数据表(HTML) 4 Page - Analog Devices

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ADP2325
Data Sheet
Rev. 0 | Page 4 of 32
SPECIFICATIONS
PVIN1 = PVIN2 = 12 V at TJ = −40°C to +125°C, unless otherwise noted.
Table 1.
Parameters
Symbol
Test Conditions/Comments
Min
Typ
Max
Unit
POWER INPUT (PVINx PINS)
Power Input Voltage Range
VPVIN
4.5
20
V
Quiescent Current (PVIN1 + PVIN2)
IQ
MODE = GND, no switching
3
5
mA
Shutdown Current (PVIN1 + PVIN2)
ISHDN
EN1 = EN2 = GND
30
40
μA
PVINx Undervoltage Lockout Threshold
UVLO
PVINx Rising
4.2
4.4
V
PVINx Falling
3.5
3.7
V
FEEDBACK (FBx PINS)
FBx Regulation Voltage1
VFB
PVINx = 4.5 V to 20 V
0.594
0.6
0.606
V
FBx Bias Current
IFB
0.01
0.1
μA
ERROR AMPLIFIER (COMPx PINS)
Transconductance
gm
370
500
630
μS
Error Amplifier Source Current
ISOURCE
40
65
90
μA
Error Amplifier Sink Current
ISINK
45
65
85
μA
INTERNAL REGULATOR (INTVCC PIN)
INTVCC Voltage
4.75
5
5.25
V
Dropout Voltage
IINTVCC = 30 mA
300
mV
Regulator Current Limit
80
100
120
mA
SWITCH NODE (SWx PINS)
High-Side On Resistance2
VBST to VSW = 5 V
48
80
High-Side Peak Current Limit
RILIM = floating, VBST to VSW = 5 V
6.4
8
9.6
A
RILIM = 47 kΩ, VBST to VSW = 5 V
3.4
4.8
6.2
A
Low-Side Negative Current-Limit Threshold
Voltage3
50
mV
SWx Minimum On Time3
tMIN_ON
130
ns
SWx Minimum Off Time3
tMIN_OFF
150
ns
LOW-SIDE DRIVER (DLx PINS)
Rising Time3
tR
CDL = 2.2 nF, see Figure 23
20
ns
Falling Time3
tF
CDL = 2.2 nF, see Figure 26
10
ns
Sourcing Resistor
4
6
Ω
Sinking Resistor
1.4
3
Ω
OSCILLATOR (RT PIN)
PWM Switching Frequency
fSW
ROSC = 100 kΩ
510
600
690
kHz
PWM Frequency Range
250
1200
kHz
SYNCHRONIZATION (SYNC PIN)
SYNC Input
SYNC configured as input
Synchronization Range
300
1200
kHz
Minimum On Pulse Width
100
ns
Minimum Off Pulse Width
100
ns
High Threshold
1.3
V
Low Threshold
0.4
V
SYNC Output
SYNC configured as output
Frequency on SYNC Pin
fCLKOUT
fSW
kHz
Positive Pulse Time
100
ns
SOFT START (SSx PINS)
SSx Pin Source Current
ISS
2.5
3.5
4.5
μA


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