TPS65279V Datasheet, PDF (10/43 Pages) Texas Instruments – 4.5-V TO 18-V INPUT VOLTAGE, 5-A/5-A DUAL SYNCHRONOUS STEP-DOWN CONVERTER WITH I2C CONTROLLED VID AND CURRENT SHARING

TPS65279V
SLVSBW1A – FEBRUARY 2013 – REVISED JUNE 2013
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
VIN
Input operating voltage
T_A
Ambient temperature
ELECTROSTATIC DISCHARGE (ESD) PROTECTION
Human body model (HBM)
Charge device model (CDM)
ELECTRICAL CHARACTERISTICS
T_J = 25°C, V_IN = 12 V (unless otherwise noted)
PARAMETER
INPUT SUPPLY
V_IN
IDD_SDN
IDD_{Q_NSW}
Input Voltage range
Shutdown supply current
Switching quiescent current with no
load at DCDC output
IDD_{Q_SW}
Switching quiescent current with no
load at DCDC output, Buck switching
UVLO
V_IN under voltage lockout
V_7V
6.3 V LDO
I_{OCP_V7V}
ENABLE
V_ENR
V_ENF
I_ENR
I_ENF
OSCILLATOR
Current limit of V7V LDO
Enable threshold
Enable threshold
Enable Input current
Enable hysteresis current
TEST CONDITIONS
VIN1 and VIN2
EN1 = EN2 = low
EN1 = EN2 = 3.3 V
Without bucks switching
EN1 = EN2 = 3.3 V
With bucks switching
Rising V_IN
Falling V_IN
Hysteresis
V_7V load current = 0 A,
V_IN = 12 V
EN = 1 V
EN = 1.5 V
F_SW
T_{SYNC_w}
V_{SYNC_HI}
V_{SYNC_LO}
V_{SYNC_D}
F_SYNC
Switching frequency
Clock sync minimum pulse width
Clock sync high threshold
Clock sync low threshold
Clock falling edge to LX rising edge
delay
Clock sync frequency range
R_OSC = 100 kΩ (1%)
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MIN NOM MAX UNIT
4.5
18
V
–40
85
°C
MIN
1000
250
MAX
UNIT
V
V
MIN
TYP
MAX UNIT
4.5
18 V
10
µA
1.2
mA
10
mA
4.25
4.50
3.5
3.75
V
0.5
6.10
6.3
6.5 V
200
mA
1.21
1.26 V
1.10
1.17
V
3
µA
3
µA
200
1600
kHz
340
400
460
20
ns
2V
0.8
V
66
ns
200
1600 kHz
10
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