LTC1923EGN View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC1923EGN Datasheet PDF : 28 Pages
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LTC1923
ELECTRICAL CHARACTERISTICS
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
VDD = 5V, RSLEW = VDD, SDSYNC = VDD, RT = 10k, CT = 330pF unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Reference
VREF
Reference Output Voltage
No Load
2.462 2.5 2.538
V
q 2.450
2.550
V
VREFGD VREF Good Threshold
LDREG Load Regulation
LINEREG Line Regulation
VREFISC Short-Circuit Current
Oscillator and Phase-Locked Loop
VREF Rising Threshold
ILOAD = –1mA to –10mA
VDD = 2.7V to 5.5V
VREF = 0V
q
2.25 2.45
V
10
25
mV
5
20
mV
10
20
mA
fOSCI
Initial Oscillator Frequency
fOSC
OSCPK
Frequency Variation
CT Ramp Peak
OSCVLY CT Ramp Valley
CTICH
CTIDIS
PLLGAIN
IPLLLPF
CT Charge Current
CT Discharge Current
Gain from PLLLPF to RT
Phase Detector Output Current
Sinking
Sourcing
MSTTH Master Threshold On PLLLPF Pin
SDDLY Shutdown Delay to Output
Error Amplifier
RT = 10k, CT = 330pF
VDD = 2.7V to 5V, CT = 330pF, RT = 10k
CT = 0.3V, RT = 10k
CT = 1.8V, RT = 10k
fSYNC < fOSC
fSYNC > fOSC
Measured at SDSYNC Pin
190 225 260
kHz
q 165
225
270
kHz
1.4
1.5
1.6
V
0.4
0.5
0.6
V
–150
µA
150
µA
– 1.1 – 0.9 – 0.7
V/V
12
µA
–12
µA
VDD – 0.7 VDD – 0.4
V
20
45
µs
VOS
Input Offset Voltage
AOL
Open-Loop Gain
VCM
IIB
VOH
VOL
ISOURCE
ISINK
GBW
Common Mode Input Range
FB and CNTRL Input Bias Currents
Output High
Output Low
Sourcing Current
Sinking Current
Gain-Bandwidth Product
Current Sense Amplifier
ACS
Amplifier Gain
CSOFF Amplifier Offset
ITECH
Output Sourcing Load Regulation
ITECL
Output Sinking Load Regulation
f3dB
–3dB Frequency
ILIMTH
ILIMDLY
SSICHG
SSILIM
ILIM
Current Limit Threshold
Current Limit Delay to Output
Soft-Start Charge Current
Soft-Start Current Limit Threshold
ILIM Current Limit Threshold
EAOUT = 1V, VCM = 2.5V
EAOUT = 0.45V to 1.55V, CNTRL = 2.5V
EAOUT = 1V
FB = CNTRL = 1.25
ILOAD = – 100µA
ILOAD = 100µA
EAOUT = 1V, FB = 2.4V, CNTRL = 2.5V
EAOUT = 1V, FB = 5V, CNTRL = 2.5V
f = 100kHz (Note 3)
Measured at ITEC
CS + - CS– = 100mV, ILOAD = 0 to – 50µA
CS + - CS– = 100mV, ILOAD = 0 to 50µA
(Note 3)
Measured at CS+, CS–
SS = 0.75V
SS = 0.5V, Measured at CS+, CS–
ILIM = 0.5V, Measured at CS+, CS–
– 18
0.2
– 100
1
18
mV
80
dB
VDD + 0.2
V
100
nA
1.65
V
0.3 0.45
V
–1.5 – 0.5
mA
2
mA
2
MHz
10
V/V
– 15
–2
10
mV
0.1
0.2
V
0.1
0.2
V
500
kHz
q 125
145
165
mV
300 450
ns
– 2.5 – 1.5 – 0.5
µA
50
70
90
mV
50
70
90
mV
1923f
3
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