LTC3456_15 Datasheet, PDF (3/28 Pages) Linear Technology – 2-Cell, Multi-Output DC/DC Converter with USB Power Manager

LTC3456
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at T_A = 25°C.
V_BATT = 2.4V, V_INT = 3.3V, V_PWRON = 2V, PWRKEY is open, V_USB = 0V, V_WALLFB = 0V, unless otherwise specified.
PARAMETER
CONDITIONS
MIN TYP MAX
Switch Leakage (USB/Wall Powered)
SW2_BK PMOS Switch
SW2_BK NMOS Switch
Switch On-Resistance (USB/Wall Powered)
SW2_BK PMOS Switch
SW2_BK NMOS Switch
Switch Current Limit
Battery Powered (SW2_BST NMOS Current)
Wall/USB Powered (SW2_BK PMOS Current)
V_MAIN PMOS Switch On-Resistance
V_MAIN Turn-On Delay
Battery Powered
USB or Wall Powered
Hot Swap Output
V_EXT = 5V, V_WALLFB = 1.5V, V_PWRON = 0V
V_{SW2_BK} = 0V
V_{SW2_BK} = 5V
V_EXT = 5V, V_WALLFB = 1.5V
I_{SW2_BK} = 150mA
I_{SW2_BK} = –150mA
V_BATT = 2.4V
V_EXT = 5V, V_WALLFB = 1.5V
Measured Between V_INT and V_MAIN Pins
After FB1 and V_INT in Regulation
V_BATT = 2.4V
V_EXT = 5V, V_WALLFB = 1.5V
0.1
1
0.1
1
0.9
0.4
700 900
400 500
0.4
●
0.8
2
●
1.5
2
HSO PMOS Switch On-Resistance
HSO PMOS Switch Current Limit
HSO Turn-On Delay
Battery Powered
USB or Wall Powered
V_MAX Output
V_MAX Output Voltage
Shutdown
Battery Powered
USB/Wall Powered
Maximum V_MAX Output Current
Core Output
Measured Between V_INT and HSO Pins
V_INT = 3.3V, V_HSO = 2.5V
After FB1 and V_INT in Regulation
V_BATT = 2.4V
V_EXT = 5V, V_WALLFB = 1.5V
0.8
90
120
●
0.5
1
●
0.5
1
V_MAX Output Unloaded
V_PWRON = 0V
V_PWRON = 2V, V_BATT = 2.4V
V_PWRON = 2V, V_EXT = 5V, V_WALLFB = 1.5V
V_MAX Output < 12.5% Below Nominal Value
●1
V_BATT
3.3
5
FB1 Voltage
● 0.784 0.800 0.816
FB1 Voltage Line Regulation
FB1 Pin Input Bias Current
Duty Cycle Range
V_BATT = 1.8V to 3.2V
V_FB1 = 0.8V
Buck Switchers
●
●
●0
0.1
0.5
±2
±20
100
SW1 PMOS Switch Current Limit
Battery Powered
Wall/USB Powered
SW1 Leakage Current
SW1 PMOS Switch On-Resistance
Battery Powered
Wall/USB Powered
SW1 NMOS Switch On-Resistance
Battery Powered
Wall/USB Powered
V_BATT = 2.4V
V_EXT = 5V
V_SW1 = 0V, V_EXT = 5V or V_BATT = 5V
I_SW1 = 150mA
V_BATT = 2.4V
V_EXT = 5V, V_WALLFB = 1.5V
I_SW1 = –150mA
V_BATT = 2.4V
V_EXT = 5V, V_WALLFB = 1.5V
400 550
350 450
0.1
1
0.5
0.5
0.4
0.4
UNITS
µA
µA
Ω
Ω
mA
mA
Ω
ms
ms
Ω
mA
ms
ms
V
V
V
mA
V
%/V
nA
%
mA
mA
µA
Ω
Ω
Ω
Ω
3456fa
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