LTC3884 datasheet(4/26 Pages) AD

4 / 26 page

LTC7883

Rev. 0

For more information www.analog.com

ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the specified operating

junction temperature range, otherwise specifications are at TJ = 25°C (Note 2). Specifications apply to both units with VCC = 5V,

VSNSP = 1.8V, VSNSM = IAVGND = GND = 0V, fSYNC = 500kHz (externally driven) unless otherwise specified.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX UNITS

Input Voltage Supervisor

VON_TOL

Input ON/OFF Threshold Error

15V ≤ VIN_ON ≤ 35V

–2

NVON

Input ON/OFF Threshold Resolution

143

Output Voltage Supervisors

VUVOV_R0

Range 0 Maximum Threshold

Range 0 Error

Range 0 Threshold Resolution

Range 0 Threshold Hysteresis

2V ≤ VOUT ≤ 5V (Falling for UV and Rising for OV)

–1

5.5

VUVOV_R1

Range 1 Maximum Threshold

Range 1 Error

Range 1 Threshold Resolution

Range 1 Threshold Hysteresis

1V ≤ VOUT ≤ 2.5V (Falling for UV and Rising for OV)

–1

2.75

5.5

Output Current Supervisors

VILIM_TOL

Output Current Limit Tolerance

CSP – CSM

15mV < CSP – CSM ≤ 30mV

30mV < CSP – CSM ≤ 50mV

50mV < CSP – CSM ≤ 70mV

–1.7

–2.5

–5.2

1.7

2.5

5.2

NlLIM

CSP – CSM Threshold Resolution

1LSB

0.4

ADC Readback Telemetry (Note 8)

NVIN

VINS Readback Resolution

(Note 9)

Bits

VIN_TUE

VINS Total Unadjusted Readback Error 4.5V ≤ VINS ≤ 38V

0.5

NDC

PWM Duty Cycle Resolution

(Note 9)

Bits

DCTUE

PWM Duty Cycle Total Unadjusted

Readback Error

PWM Duty Cycle = 12.5%

–2

NVOUT

VOUT Readback Resolution

244

µV

VOUT_TUE

VOUT Total Unadjusted Readback Error 0.6V ≤ VOUT ≤ 5.5V, Constant Load

–0.5

±0.2

0.5

NISENSE

IOUT Readback Resolution

LSB Step Size (at ISENSE±)

(Note 9)

0mV ≤ |CSP – CSM| < 16mV

16mV ≤ |CSP – CSM| < 32mV

32mV ≤ |CSP – CSM| < 63.9mV

63.9mV ≤ |CSP – CSM| ≤ 70mV

15.625

31.25

62.5

125

Bits

µV

ISENSE_TUE

IOUT Total Unadjusted Readback Error

|CSP – CSM| ≥ 6mV, 0V ≤ VOUT ≤ 5.5V

±1

ISENSE_OS

IOUT Zero-Code Offset Voltage

±32

µV

NTEMP

Temperature Resolution

0.25

°C

TEXT_TUE

External Temperature Total Unadjusted

Readback Error

TSNS ≤ 1.85V (Note 10)

MFR_PWM_MODE_LTC3882-1[6] = 0

MFR_PWM_MODE_LTC3882-1[6] = 1

–3

–7

°C

TINT_TUE

Internal Temperature Total Unadjusted

Readback Error

Internal Diode (Note 10)

±1

°C

tCONVERT

Update Rate

(Note 11)

Internal EEPROM (Notes 4, 6)

Endurance

Number of Write Operations

0°C ≤ TJ ≤ 85°C During All Write Operations

10,000

Cycles

Retention

Stored Data Retention

TJ ≤ 125°C

Years

Mass Write Time STORE_USER_ALL Execution Duration 0°C ≤ TJ ≤ 85°C During All Write Operations

0.2

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