LTC3883 Datasheet, PDF (6/112 Pages) Linear Technology – Single Phase Step-Down DC/DC Controller with Digital Power System Management

LTC3883/LTC3883-1
Electrical Characteristics The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T_A = 25°C (Note 2). V_IN = 12V, V_RUN = 3.3V, f_SYNC = 500kHz (externally
driven) unless otherwise specified.
SYMBOL PARAMETER
V_INRANGE
V_INSTP
V_INTHACC
t_PROPVIN
Full-Scale Voltage
Step Size
Threshold Accuracy 8.75V < V_IN < 20V
Comparator Response Time
(VIN_ON and VIN_OFF)
Output Voltage Readback
N
Resolution
LSB Step Size
V_F/S
V_{OUT_TUE}
Full-Scale Sense Voltage
Total Unadjusted Error
V_OS
Zero-Code Offset Voltage
t_CONVERT
Conversion Time
V_IN Voltage Readback
N
Resolution
V_F/S
V_{IN_TUE}
Full-Scale Input Voltage
Total Unadjusted Error
t_CONVERT
Conversion Time
Output Current Readback
N
Resolution
LSB Step Size
I_F/S
Full-Scale Input Current
I_{OUT_TUE}
Total Unadjusted Error
V_OS
Zero-Code Offset Voltage
t_CONVERT
Conversion Time
Input Current Readback
N
Resolution
LSB Step Size
I_{IN_TUE}
Total Unadjusted Error
V_OS
Zero-Code Offset Voltage
t_CONVERT
Conversion Time
Supply Current Readback
N
Resolution
LSB Step Size
I_{CHIP_TUE}
Total Unadjusted Error (LTC3883 Only)
Total Unadjusted Error (LTC3883-1 Only)
t_CONVERT
Conversion Time
Duty Cycle Readback
D_RES
Resolution
D_TUE
Total Unadjusted Error
t_CONVERT
Conversion Time
CONDITIONS
V_OD = 10% of Threshold
MIN TYP MAX
4.5
20
82
l
±2.5
100
(Note 10) V_RUN = 0V (Note 8)
T_J = 25°C, V_OUT > 0.6V
(Note 8)
l
l
(Note 6)
(Note 5)
(Note 11)
T_J = 25°C, V_VIN > 4.5V
l
(Note 6)
(Note 5)
0361V246mmm≤VVV|V≤≤≤_{IS|||EVVVNIIISSSSEEEENNN+SSS}–_EEE+++V–––_{ISEVVVNIIISSSSEEEENNN–}|_SSSEEE≤_{–––}1||| 6≤≤≤m361V242mm8mVVV
(Note 7) R_ISENSE = 1mΩ
(Note 8) V_ISENSE > 6mV
l
(Note 6)
(Note 5)
8x Gain, 0V ≤ |V_{IN_SNS} – I_{IN_SNS}| ≤ 8mV
4x Gain, 0V ≤ |V_{IN_SNS} – I_{IN_SNS}| ≤ 20mV
2x Gain, 0V ≤ |V_{IN_SNS} – I_{IN_SNS}| ≤ 50mV
8x Gain, V_ISENSE > 2.5mV (Note 8)
l
4x Gain, V_ISENSE > 4mV (Note 8)
l
2x Gain, V_ISENSE > 6mV (Note 8)
l
(Note 6)
(Note 5)
l
l
(Note 6)
(Note 5)
16.3% Duty Cycle
–3
(Note 6)
16
244
8
0.2
0.5
±500
90
10
38.91
0.4
2
90
10
15.26
30.52
61
122
±128
±1
±28
90
10
15.26
30.52
61
±1.6
±1.3
±1.2
±50
180
10
122
±5
±200
180
10
3
90
UNITS
V
mV
%
µs
Bits
µV
V
%
%
µV
ms
Bits
V
%
%
ms
Bits
µV
µV
µV
µV
A
%
µV
ms
Bits
µV
µV
µV
%
%
%
µV
ms
Bits
µV
%
µA
ms
Bits
%
ms
3883f
6