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參數資料
| 型號： | UC3573D |
| 英文描述： | 2 step-down DC/DC converters / 5 LDO power management |
| 中文描述： | 電壓模式開關電源控制器 |
| 文件頁數： | 2/8頁 |
| 文件大小： | 208K |
| 代理商： | UC3573D |
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
System Parameters Circuit Figure 1(Note 3)
Output Voltage
VIN = 5V to 10V, I
LOAD
= 100mA to 800mA
T
J
= 25
°
C
VIN = 3.0V to 10V, I
LOAD
= 300mA
T
J
= 25
°
C
VIN = 5V, I
LOAD
= 100mA to 800mA
T
J
= 25
°
C
VIN = 5V, I
LOAD
= 800mA
11.40
11.60
12.0
12.60
12.40
100
50
100
50
V
V
Line Regulation
20
mV
mV
mV
mV
%
Load Regulation
20
Efficiency
Device Parameters
Input Supply Current
80
V
FB
= 1.5V (Switch Off)
T
J
= 25
°
C
I
SWITCH
= 2.0A, V
COMP
= 2.0V (Max Duty Cycle)
T
J
= 25
°
C
I
SWITCH
= 100mA
T
J
= 25
°
C
Measured at SWITCH Pin, I
SWITCH
= 100mA
T
J
= 25
°
C
Measured at FB Pin, VIN = 3.0V to 40V, V
COMP
= 1.0V
T
J
= 25
°
C
VIN = 3.0V to 40V
V
COMP
= 1.0V
T
J
= 25
°
C
I
COMP
=
30
μ
A to +30
μ
A, V
COMP
= 1.0V
T
J
= 25
°
C
V
COMP
= 0.8V to 1.6V, R
COMP
= 1.0MW (Note 4)
T
J
= 25
°
C
Upper Limit V
FB
= 1.0V
T
J
= 25
°
C
Lower Limit V
FB
= 1.5V
T
J
= 25
°
C
V
FB
= 1.0V to 1.5V, V
COMP
= 1.0V
T
J
= 25
°
C
V
FB
= 1.0V, V
COMP
= 0.5V
T
J
= 25
°
C
V
COMP
= 1.5V, I
SWITCH
= 100mA
T
J
= 25
°
C
7.5
14
10
85
70
2.95
2.85
62
56
1.254
1.246
mA
mA
mA
mA
V
V
kHz
kHz
V
V
mV
nA
nA
μ
mho
μ
mho
V/V
V/V
V
V
V
V
μ
A
μ
A
μ
A
μ
A
%
%
45
Input Supply UVLO
2.70
Oscillator Frequency
42
48
52
Reference Voltage
1.206
1.214
1.230
Reference Voltage Line Regulation
Error Amp Input Bias Current
0.5
100
800
300
5800
4800
Error Amp Transconductance
1600
2400
250
500
2.0
2.2
3700
Error Amp Voltage Gain
800
Error Amplifier Output Swing
2.4
0.3
0.55
0.40
±
400
±
300
9.5
7.5
Error Amp Output Current
±
90
±
130
1.5
2.5
90
93
±
200
Soft Start Current
5.0
Maximum Duty Cycle
95
Unless otherwise stated, these specifications apply for T
A
=
40
°
C
to
+125
°
C, VIN =
5V, V
FB
= V
REF
, I
SWITCH
= 0, and T
A
=T
J
.
ELECTRICAL CHARACTERISTICS
RECOMMENDED OPERATING RANGE
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . 3.0V
≤
VIN
≤
40V
Output Switch Voltage . . . . . . . . . . . . . . . 0V
≤
V
SWITCH
≤
60V
Output Switch Current . . . . . . . . . . . . . . . . . . . . I
SWITCH
≤
3.0A
Junction Temperature Range. . . . . . . . . .
40
°
C
≤
T
J
≤
+125
°
C
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45V
Output Switch Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65V
Output Switch Current (Note 2) . . . . . . . . . . . . . . . . . . . . . 6.0A
Power Dissipation. . . . . . . . . . . . . . . . . . . . . . Internally Limited
Storage Temperature Range . . . . . . . . . . . . .
65
°
C to +150
°
C
Lead Temperature (Soldering, 10 sec.) . . . . . . . . . . . . . . 260
°
C
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . 150
°
C
Minimum ESD Rating (C = 100pF, R = 15k
) . . . . . . . . . . . 2kV
ABSOLUTE MAXIMUM RATINGS
(Note 1)
UC2577-ADJ
2
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