LTC3883 Datasheet, PDF (7/112 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
CONDITIONS
MIN TYP MAX
Temperature Readback (T0, T1)
T_{RES_T}
T0_TUE
Resolution
External TSNS TUE
TI_TUE
Internal TSNS TUE
t_{CONVERT_T} Update Rate
INTV_CC Regulator
V_INTVCC
Internal V_CC Voltage No Load (LTC3883 Only)
V_{LDO_INT}
INTV_CC Load Regulation (LTC3883 Only)
V_DD33 Regulator
V_DD33
Internal V_DD33 Voltage
I_LIM
V_DD33 Current Limit
V_{DD33_OV} V_DD33 Overvoltage Threshold
V_{DD33_UV} V_DD33 Undervoltage Threshold
V_DD25 Regulator
V_DD25
Internal V_DD25 Voltage
I_LIM
V_DD25 Current Limit
Oscillator and Phase-Locked Loop
V_TSNS = 72mV (Note 8)
V_RUN = 0.0V, f_SYNC = 0kHz (Note 8)
(Note 6)
6V < V_IN < 24V
I_CC = 0mA to 50mA
4.5V < V_INTVCC/V_EXTVCC
V_DD33 = GND, V_IN = INTV_CC = 4.5V
V_DD25 = GND, V_IN = INTV_CC = 4.5V
0.25
l
±3
±1
90
l 4.8
5
5.2
0.5
±2
l 3.2
3.3
3.4
100
3.5
3.1
l 2.25
2.5
2.75
80
f_OSC
Oscillator Frequency Accuracy
250kHz < f_SYNC < 1MHz Measured Falling l
±7.5
Edge-to-Falling Edge of SYNC with
SWITCH_FREQUENCY = 250.0.and 1000.0
V_TH,SYNC
SYNC Input Threshold
V_CLKIN Falling
V_CLKIN Rising
V_OL,SYNC
SYNC Low Output Voltage
I_LOAD = 3mA
l
I_LEAKSYNC SYNC Leakage Current in Slave Mode
0V ≤ V_PIN ≤ 3.6V
SYNC-
SYNC to Channel Phase Relationship Based MFR_PWM_CONFIG_LTC3883[2:0] = 0
on the Falling Edge of Sync and Rising Edge MFR_PWM_CONFIG_LTC3883[2:0] = 1
of TG
MFR_PWM_CONFIG_LTC3883[2:0] = 2
MFR_PWM_CONFIG_LTC3883[2:0] = 3
MFR_PWM_CONFIG_LTC3883[2:0] = 4
MFR_PWM_CONFIG_LTC3883[2:0] = 5
MFR_PWM_CONFIG_LTC3883[2:0] = 6
MFR_PWM_CONFIG_LTC3883[2:0] = 7
1
1.5
0.2
0.4
±5
0
90
180
270
60
120
240
300
EEPROM Characteristics
Endurance (Note 13)
0°C < T_J < 85°C During EEPROM Write
Operations
l 10,000
Retention (Note 13)
Mass_Write Mass Write Operation Time
T_J < 125°C
STORE_USER_ALL, 0°C < T_J ≤ 85°C
During EEPROM Write Operations
l 10
l
440 4100
Digital Inputs SCL, SDA, RUN, GPIO, PGOOD
V_IH
Input High Threshold Voltage
V_IL
Input Low Threshold Voltage
V_HYST
Input Hysteresis
C_PIN
Input Capacitance
Digital Input WP
SCL, SDA, RUN, GPIO, PGOOD
SCL, SDA, RUN, GPIO, PGOOD
SCL, SDA
l
2.0
l 1.4
0.08
10
I_PUWP
Input Pull-Up Current
WP
10
Open-Drain Outputs SCL, SDA, GPIO, ALERT, RUN, SHARE_CLK, PGOOD
V_OL
Output Low Voltage
I_SINK = 3mA
l
0.4
UNITS
°C
°C
°C
ms
V
%
V
mA
V
V
V
mA
%
V
V
V
µA
Deg
Deg
Deg
Deg
Deg
Deg
Deg
Deg
Cycles
Years
ms
V
V
V
pF
µA
V
3883f
7