LTC3882_15 Datasheet, PDF (6/104 Pages) Linear Technology – Dual Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management

LTC3882
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating
junction temperature range,
V_SENSE1– = I_{AVG_GND} = GND =
otherwise specifications are at T_J = 25°C (Note 2). V_CC = 5V, V_SENSE0+
0V, f_SYNC = 500kHz (externally driven) unless otherwise specified.
=
V_SENSE1+
=
1.8V,
V_SENSE0–
=
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V_{UVOV_R0}
Range 0 Maximum Threshold
Range 0 Accuracy
Range 0 LSB Step Size
2V ≤ V_OUT ≤ 5V (UV and OV)
5.5
V
l –1
1
%
11
mV
V_{UVOV_R1}
Range 1 Maximum Threshold
Range 1 Accuracy
Range 1 LSB Step Size
1V ≤ V_OUT ≤ 2.5V (UV and OV)
2.75
V
l –1
1
%
5.5
mV
Output Current Supervisors
N_lLIM
V_{ILIM_TOL}
Resolution
Step Size
Output Current Limit Accuracy
V_IREV
I_REV Threshold Voltage
ADC Readback Telemetry (Note 8)
I_SENSE+ – I_SENSE–
15mV
30mV
50mV
<
<
<
III^{SSSEEENNNSSSEEE+++}
–
–
–
III_{SSSEEENNNSSSEEE–––}
≤
≤
≤
30mV
50mV
70mV
I_SENSE+ – I_SENSE–
8
Bits
0.4
mV
l –1.7
l –2.5
l –5.2
1.7
mV
2.5
mV
5.2
mV
0
mV
N_VIN
V_{IN_TUE}
VINSNS Readback Resolution
(Note 9)
VINSNS Total Unadjusted Readback Error 4.5V ≤ VINSNS ≤ 38V
10
Bits
0.5
%
l
2
%
N_DC
DC_TUE
PWM Duty Cycle Resolution
PWM Duty Cycle Total Unadjusted
Readback Error
(Note 9)
PWM Duty Cycle = 12.5%
10
Bits
–2
2
%
N_VOUT
V_OUT Resolution
LSB Step Size
16
Bits
244
µV
V_{OUT_TUE}
V_OUT Total Unadjusted Readback Error 0.6V ≤ V_OUT ≤ 5.5V, Constant Load
±0.2
%
l –0.5
0.5
%
N_ISENSE
I_{SENSE_FS}
I_{SENSE_TUE}
I_{SENSE_OS}
N_TEMP
T_{EXT_TUE}
I_OUT
LSB
Readback Resolution
Step Size (at I_SENSE±)
I_OUT Full Scale Conversion Range
I_OUT Total Unadjusted Readback Error
I_OUT Zero-Code Offset Voltage
Temperature Resolution
External Temperature Total Unadjusted
Readback Error
(Note 9)
3610236mm.m9VmVV≤V≤≤|I≤||^SII^ESS_|^NEE_{ISSNNEESSN+EES++}^–_E^––₊^{ISII–ESSNEE}_{ISSNNEESSN–EE}^|_{S––E}^||<_–^{<<|136≤623m7m.90VmmV} VV
|I_SENSE+ – I_SENSE–| ≥ 6mV, 0V ≤ V_OUT ≤ 5.5V
TSNS0, TSNS1 ≤ 1.85V (Note 10)
MFR_PWM_MODE_LTC3882[6] = 0
MFR_PWM_MODE_LTC3882[6] = 1
10
Bits
15.625
µV
31.25
µV
62.5
µV
125
µV
±70
mV
l –1
1
%
–32
32
µV
0.25
°C
l –3
l –7
3
°C
7
°C
T_{INT_TUE}
Internal Temperature Total Unadjusted
Readback Error
Internal Diode
l
±1
°C
t_CONVERT
Update Rate
Internal EEPROM (Notes 4, 6)
(Note 11)
100
ms
Endurance
Number of Write Operations
0°C ≤ T_J ≤ 85°C During All Write Operations
Retention
Stored Data Retention
T_J ≤ 125°C
Mass Write Time STORE_USER_ALL Execution Duration 0°C ≤ T_J ≤ 85°C During All Write Operations
Digital Inputs (SCL, SDA, RUNn, GPIOn, SYNC, SHARE_CLOCK, WP)
l 10,000
l 10
l
0.2
Cycles
Years
2
s
V_IH
Input High Voltage
SCL, SDA, RUN0, RUN1, GPIO0, GPIO1
l 2.0
V
SYNC, SHARE_CLK, WP
l 1.8
V
V_IL
Input Low Voltage
SCL, SDA, RUN0, RUN1, GPIO0, GPIO1
l
SYNC, SHARE_CLK, WP
l
1.4
V
0.6
V
3882f
6
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