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參數(shù)資料
| 型號(hào)： | LTC3569IUDC#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2.5 A SWITCHING REGULATOR, 3000 kHz SWITCHING FREQ-MAX, PQCC20 |
| 封裝： | 3 X 4 MM, LEAD FREE, PLASTIC, QFN-20 |
| 文件頁(yè)數(shù)： | 20/26頁(yè) |
| 文件大?。?/td> | 468K |
| 代理商： | LTC3569IUDC#PBF |
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LTC3569
3
3569fd
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V unless otherwise noted (Notes 2, 7).
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SVIN
Input Supply Voltage
l
2.5
5.5
V
IVIN
Input Current Pulse-Skipping Mode
EN1 = SVIN, EN2, EN3 = MODE = 0V,
IOUT1, = 0A, FB1 = 0.9V (Note 3)
230
365
A
Input Current Burst Mode Operation
EN1 = MODE = SVIN, EN2, EN3 = 0V,
IOUT1, = 0A, FB1 = 0.9V (Note 3)
47
82
A
IQX
Additional Input Current per Buck,
Pulse Skipping
MODE = 0V, IOUTX, = 0A, FBx = 0.9V
(Note 3)
140
225
A
Additional Input Current per Buck,
Burst Mode Operation
MODE = SVIN, IOUTX, = 0A,
FBx = 0.9V (Note 3)
22
36
A
IQSHDN
Quiescent Current in Shutdown Mode
EN1, EN2, EN3 = 0V
VSW1 = VSW2 = VSW3 = 0V
0.1
1
A
IPK1
Peak Inductor Current SW1
1.8
2.0
2.5
A
IPK2, IPK3
Peak Inductor Current SW2, SW3
0.780
1.0
1.3
A
VFBX(MAX)
Maximum Feedback Voltage
l
0.784
0.8
0.816
V
VFBX(STEP)
Feedback Reference Step Size
Each Toggle on ENx
25
mV
VFBX(MIN)
Minimum Feedback Voltage
ENx Toggle 15 Times
l
0.405
0.425
0.44
V
VPROGFBX
Feedback Programming Range
0.425
0.8
V
IFBX
Feedback Pin Input Current
VFB = 0.8V
l
±0.2
A
ILKSWX
Switch Pin Leakage Current
VSWX = 1.8V, VENX = SVIN,
VFBX = 0.9V
±1
A
DX
Maximum Duty Cycle
FBx = 0V
100
%
RP1
RDSON of PSW for SW1
ISW1 = 100mA (Note 5)
195
mΩ
RN1
RDSON of NSW for SW1
ISW1 = –100mA (Note 5)
180
mΩ
RP2, RP3
RDSON of PSW for SW2, SW3
ISW2, ISW3 = 100mA (Note 5)
265
mΩ
RN2, RN3
RDSON of NSW for SW2, SW3
ISW2, ISW3 = –100mA (Note 5)
250
mΩ
RSWx_PD
SWx Pull-Down in Shutdown
ENx = 0V, VSWX = 1.2V,
(FBx < SVIN )
2.3
kΩ
VLINEREG
Reference Voltage Line Regulation
SVIN = 2.5V to 5.5V
0.04
0.2
%/V
VLOADREG
Output Voltage Load Regulation
Pulse-Skipping Mode (Note 4)
0.5
%
tSS
Soft-Start Reference Ramp Rate
0.75
V/ms
tEN
Enable Turn-On Delay
From Last ENx Rise to Begin of
Soft-Start Ramp
125
240
s
tOFF
Enable Turn-Off Delay
From ENx Fall to Shutdown
170
330
s
tPW
Enable Pulse Width
0.06
55
s
IENX
Enable Leakage Current
VENX = 3.6V
0.02
A
IMODE
Mode Leakage Current
VMODE = 3.6V
0.02
A
VIL
Input Low Voltage
MODE, ENx
0.4
V
VIH
Input High Voltage
MODE, ENx
1.2
V
TMODEPW
Pulse Width Applied to MODE Pin for
Synchronizing
100
ns
PGOOD
Power Good Threshold
VFBX Ramping Up
VFBX Ramping Down
–8
–12
%
TPGOOD
PGOOD Delay
Turn-On
8
s
Turn-Off
2
s
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