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參數(shù)資料
| 型號： | LT3513IUHF#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3.5 A SWITCHING REGULATOR, 2220 kHz SWITCHING FREQ-MAX, PQCC38 |
| 封裝： | 5 X 7 MM, LEAD FREE, PLASTIC, MO-220WHKD, QFN-38 |
| 文件頁數(shù)： | 16/22頁 |
| 文件大小： | 374K |
| 代理商： | LT3513IUHF#TRPBF |
LT3513
3
3513fc
elecTrical characTerisTics
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
FB Threshold Offset to Begin CT Charge
(Note 3)
90
125
160
mV
CT Pin Current Source
All FB Pins = 1.5V, CT = 0.35V
16
20
25
A
CT Threshold to Power VON
All FB Pins = 1.5V
1
1.1
1.2
V
VON Switch Drop
VON Current = 30mA
200
400
mV
Maximum VON Current
VE3 = 30V
l
30
50
mA
VON_CLK Input Voltage High
1.5
V
VON_CLK Input Voltage Low
0.3
V
VONSINK Voltage On
VONSINK Current = 1A
l
1.2
V
Master Oscillator Frequency
l
1.90
1.80
2
2.12
2.22
MHz
Foldback Switching Frequency
FB2 = 0V, FB3 = 0V, NFB4 = 0V
200
kHz
UVLO Pin Threshold
UVLO Pin Voltage Rising
1.25
V
UVLO Pin Hysteresis Current
VUVLO = 1V
3.4
3.9
4.5
A
PGOOD Threshold Offset
90
125
160
mV
PGOOD Sink Current
PGOOD Connected to 40V Through 100k
4
mA
PGOOD Pin Leakage
VPGOOD = 40V
1
A
Switch 1 (2.2A Buck)
FB1 Voltage
l
1.215
1.205
1.235
1.255
1.265
V
FB1 Voltage Line Regulation
4.5V < VIN < 30V
0.01
0.03
%/V
FB1 Pin Bias Current
(Note 4)
l
30
200
nA
Error Amplifier 1 Voltage Gain
250
V/V
Error Amplifier 1 Transconductance
ΔI = 10A
220
mhos
Maximum Duty Cycle
l
75
85
%
Switch 1 Current Limit
Duty Cycle = 35% (Note 6)
2.2
3
3.5
A
Switch 1 VCESAT
ISW = 1.5A
430
mV
Switch 1 Leakage Current
FB1 = 1.5V, RUN-SS1 = 0V
0.1
10
A
Minimum BOOST Voltage Above SW1 Pin
ISW = 1.5A (Note 7)
1.8
2.5
V
BOOST Pin Current
ISW = 1.5A
30
50
mA
BOOST Schottky Diode Drop
I = 170mA
700
mV
Switch 2 (1.5A BOOST)
FB2 Voltage
l
1.20
1.19
1.22
1.24
1.25
V
FB2 Voltage Line Regulation
4.5V < VIN < 30V
0.01
0.03
%/V
FB2 Pin Bias Current
(Note 5)
l
30
200
nA
Error Amplifier 2 Voltage Gain
250
V/V
Error Amplifier 2 Transconductance
ΔI = 10A
220
mhos
Switch 2 Current Limit
(Note 6)
1.5
1.85
2.4
A
Switch 2 VCESAT
ISW2 = 1.2A
360
mV
Switch 2 Leakage Current
FB2 = 1.5V, RUN-SS1 = 0V
0.1
1
A
BIAS Pin Current Due to SW2
ISW2 = 1.2A
45
mA
Maximum Duty Cycle (SW2)
l
75
90
%
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, BIAS = 3V, unless otherwise noted.
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