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參數(shù)資料
| 型號： | IRU3072C |
| 廠商： | International Rectifier |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 20-PIN SYNCHRONOUS PWM CONTROLLER/ 3 LDO CONTROLLER |
| 中文描述： | 20引腳同步PWM控制器/ 3 LDO控制器 |
| 文件頁數(shù)： | 3/24頁 |
| 文件大?。?/td> | 332K |
| 代理商： | IRU3072C |
IRU3072
3
Rev. 1.0
3/25/04
www.irf.com
PARAMETER
Soft-Start Section
Charge Current
Error Amp
Fb Voltage Input Bias Current
Fb Voltage Input Bias Current
Transconductance
Oscillator
Frequency
SYM TEST CONDITION MIN TYP MAX UNITS
Ramp Amplitude
Output Drivers
Rise Time
Fall Time
Dead Band Time 1
Dead Band Time 2
Max Duty Cycle
Min Duty Cycle
LDO Controller Section
Drive Current
Fb Voltage
Input Bias Current
Thermal Shutdown
Current Limit
OC Threshold Set Current
OC Comp Off-Set Voltage
Note 1:
Guaranteed by design but not tested in production.
SS1=SS2=0V
SS1=3V
SS1=0V
Rt=100K
Rt=39K
Note 1
C
LOAD
=3000pF (10% to 90%)
Vcc=12V
C
LOAD
=3000pF (90% to 10%),
Vcc=12V
Vcc=12V, C
LOAD
=3000pF
HDrv falls,LDrv rises
Vcc=12V, C
LOAD
=3000pF
LDrv falls, HDrv rises
Fb=0.7V, Freq=200KHz
Fb=0.9V
Drv2, 3 and 4
Note 1
15
35
500
170
340
50
20
85
40
0.784
23
-7
25
0.1
900
200
400
1.27
50
50
115
50
92
0
60
0.8
0.5
150
30
0
μ
A
μ
A
μ
A
μ
mho
KHz
V
PP
ns
ns
ns
ns
%
%
mA
V
μ
A
8
C
μ
A
mV
PIN DESCRIPTIONS
PIN# PIN SYMBOL PIN DESCRIPTION
1
2
3
4
5
Vcc
Outputs of the linear regulator controllers.
This pin provides power for the LDO controllers.
This pin provides biasing for the internal blocks of the IC as well as power for the low side
driver. A minimum of 1
μ
F, high frequency capacitor must be connected from this pin to
ground to provide peak drive current capability.
Output driver for the synchronous power MOSFET.
This pin serves as the ground pin and must be connected directly to the ground plane. A
high frequency capacitor (0.1 to 1
μ
F) must be connected from Vcc, Vc and VccLDO pins
to this pin for noise free operation.
This pin serves as the separate ground for MOSFET's driver and should be connected to
system's ground plane.
Output driver for the high side power MOSFET. Connect a diode, such as BAT54 or 1N4148,
from this pin to ground for the application when the inductor current goes negative (Source/
Sink), soft-start at no load and for the fast load transient from full load to no load.
6
7
8
9
Drv4
Drv3
Drv2
VccLDO
LDrv
Gnd
PGnd
HDrv
35
1
75
1300
230
460
100
100
150
100
99
0.816
2
37
+7
SS I
B1
,I
B2
I
FB1
I
FB2
Freq
V
RAMP
Tr
Tf
T
DB
D
MAX
D
MIN
I
OCSET
V
OC(OFFSET)
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