LTC1539 데이터 시트보기 (PDF) - Linear Technology
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LTC1539 Datasheet PDF : 32 Pages
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LTC1538-AUX/LTC1539
ELECTRICAL CHARACTERISTICS TA = 25°C, VIN = 15V, VRUN/SS1,2 = 5V unless otherwise noted.
SYMBOL
PARAMETER
Main Control Loops
IIN VOSENSE2
VOUT1,2
Feedback Current
Regulated Output Voltage
1.19V (Adjustable) Selected
3.3V Selected
5V Selected
VLINEREG1,2 Reference Voltage Line Regulation
VLOADREG1,2 Output Voltage Load Regulation
VSFB1
ISFB1
VOVL
IPROG1,2
Secondary Feedback Threshold
Secondary Feedback Current
Output Overvoltage Lockout
VPROG1,2 Input Current
IQ
Input DC Supply Current
Normal Mode
Shutdown
VRUN/SS1,2
IRUN/SS1,2
∆VSENSE(MAX)
TGL1, 2 tr, t f
Run Pin Threshold
Soft Start Current Source
Maximum Current Sense Threshold
TGL1, TGL2 Transition Time
Rise Time
Fall Time
TGS1, 2 tr, tf TGS1, TGS2 Transition Time
Rise Time
Fall Time
BG1, 2 tr, tf
BG1, BG2 Transition Time
Rise Time
Fall Time
Internal VCC Regulator – 5V Standby
VINTVCC
Internal VCC Voltage
VLDO INT
INTVCC Load Regulation
VLDO EXT
EXTVCC Voltage Drop
VEXTVCC
EXTVCC Switchover Voltage
Oscillator and Phase-Locked Loop
fOSC
Oscillator Frequency
VCO High
RPLLIN
IPLLLPF
PLLIN Input Resistance
Phase Detector Output Current
Sinking Capability
Sourcing Capability
Power-On Reset
VSATPOR1
POR1 Saturation Voltage
ILPOR1
VTHPOR1
POR1 Leakage
POR1 Trip Voltage
tDPOR1
POR1 Delay
CONDITIONS
MIN TYP MAX UNITS
VPROG1, VPROG2 Pins Open (Note 2)
10
50
nA
(Note 2)
VPROG1, VPROG2 Pins Open
VPROG1, VPROG2 = 0V
VPROG1, VPROG2 = INTVCC
q 1.178 1.19 1.202
V
q 3.220 3.30 3.380
V
q 4.900 5.00 5.100
V
VIN = 3.6V to 20V (Note 2), VPROG1,2 Pins Open
0.002 0.01
%/V
ITH1,2 Sinking 5µA (Note 2)
ITH1,2 Sourcing 5µA
q
0.5
0.8
%
q
– 0.5 – 0.8
%
VSFB1 Ramping Negative
q 1.16 1.19 1.22
V
VSFB1 = 1.5V
VPROG1,2 Pin Open, SENSE – 1 and VOSENSE2 Pins
–1
–2
µA
1.24 1.28 1.32
V
0.5V > VPROG1,2
INTVCC – 0.5V < VPROG1,2 < INTVCC
–3
–6
µA
3
6
µA
EXTVCC = 5V (Note 3)
3.6V < VIN < 30V, VAUXON = 0V
VRUN/SS1,2 = 0V, 3.6V < VIN < 15V
320
µA
70
200
µA
q 0.8
1.3
2
V
VRUN/SS1,2 = 0V
VOSENSE1,2 = 0V, 5V VPROG1,2 = Pins Open
1.5
3
4.5
µA
130 150 180
mV
CLOAD = 3000pF
CLOAD = 3000pF
50
150
ns
50
150
ns
CLOAD = 500pF
CLOAD = 500pF
100 150
ns
50
150
ns
CLOAD = 3000pF
CLOAD = 3000pF
50
150
ns
50
150
ns
6V < VIN < 30V, VEXTVCC = 4V
INTVCC = 20mA, VEXTVCC = 4V
INTVCC = 20mA, VEXTVCC = 5V
INTVCC = 20mA, EXTVCC Ramping Positive
q 4.8
5.0
5.2
V
– 0.2
–1
%
170 300
mV
q 4.5
4.7
V
COSC = 100pF, LTC1539: PLL LPF = 0V (Note 4)
LTC1539, VPLLLPF = 2.4V
LTC1539
fPLLIN < fOSC
fPLLIN > fOSC
112 125 138
kHz
200 240
kHz
50
kΩ
10
15
20
µA
10
15
20
µA
IPOR1 = 1.6mA, VOSENSE1 = 1V,
VPROG1 Pins Open
VPOR1 = 12V, VOSENSE1 = 1.19V, VPROG1 Pin Open
VPROG1 Pin Open % of VREF
VOSENSE1 Ramping Negative
VPROG1 Pin Open
0.6
0.2
– 11 – 7.5
65536
1
V
1
µA
–4
%
Cycles
3
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