IR3084 查看數據表（PDF） - International Rectifier
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IR3084 Datasheet PDF : 45 Pages
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IR3084
PARAMETER
TEST CONDITION
VRRDY OUTPUT
Output Voltage
Leakage Current
I(VRRDY) = 4mA
V(VRRDY) = 5.5V
OSCILLATOR
Switching Frequency
Peak Voltage (4.8V typical,
measured as % of VBIAS)
Valley Voltage (0.9V typical,
measured as % of VBIAS)
DRIVER BIAS REGULATOR
REGSET Bias Current
1.5V ≤ V(REGSET) ≤ VCC – 1.5V
Input Offset Voltage
Short Circuit Current
Dropout Voltage
1.5V ≤ V(REGSET) ≤ VCC – 1.5V,
100µA ≤ I(REGDRV) ≤ 10mA
V(REGDRV) = 0V,
1.5V ≤ V(REGSET) ≤ VCC – 1.5V,
Note 1
I(REGDRV) = 10mA, Note 1
VCC UNDER−VOLTAGE LOCKOUT
Start Threshold
Stop Threshold
Hysteresis
Start – Stop
GENERAL
VCC Supply Current
VOSNS− Current
−0.3V ≤ VOSNS− ≤ 0.3V,
All VID Codes
MIN TYP MAX UNIT
150
300
mV
0
10
µA
450 500 550 kHz
70
72
74
%
10
13
15
%
−112 −99 −85
µA
−12
0
12
mV
10
20
50
mA
0.4 0.87 1.33
V
9.3
9.9 10.3
V
8.5
9.1
9.5
V
575 800 1000 mV
9
14
18
mA
−1.45 −1.3 −0.75 mA
Note 1: Guaranteed by design but not tested in production
Note 2: VDAC Output is trimmed to compensate for Error Amp input offsets errors
IR3084
+
+
"FAST"
VDAC
-
-
ISOURCE
ISINK
VDAC
BUFFER
AMP
200 OHM
EAOUT
ERROR
AMP
FB
VSETPT
OCSET
VDAC
IOFFSET IROSC
IROSC IOCSET
RVDAC
CURRENT
SOURCE
GENERATOR
ROSC
BUFFER
AMP
CVDAC
ROSC
+
1.2V
-
VOSNS-
ROSC
Page 5 of 45
Figure 1 – System Set Point Test Circuit
200 OHM
SYSTEM
SET POINT
VOLTAGE
07/20/2005
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