SC1480
POWER MANAGEMENT
Electrical Characteristics Cont.
Test Conditions: VIN = 2.5V, REFIN = 1.25, VCCA = VDDP = 5.0V, VOUT = 1.25V, RTON = 1M (300kHz), 0.1% Resistor Dividers
Parameter
Conditions
25°C
-40°C to 125°C Units
Min
Typ
Max
Min
Max
PGOOD Fault Delay
FB forced outside PGOOD
window.
2.0
µs
VCCA Under Voltage Threshold
VDDP Under Voltage Threshold
VDDP Under Voltage Hysteresis
Over Temperature Lockout
Soft Start
Rising Edge Hysteresis 100mv
4.0
3.3
3.7
3.0
4.3
V
V
3.75
250
165
mV
C
10°C Hysteresis
Soft-Start Ramp Time
Under-Voltage Blank Time
Gate Drivers
REFIN high to full current limit.
SMPS Turn-On
1.6
2
ms
ms
Dead Time
DH or DL rising
30
0.8
2
ns
Ω
Ω
Ω
Ω
A
DL Pull-Down Resistance
DL Pull-Up Resistance
DH Pull-Down Resistance
DH Pull-Up Resistance
DL Sink Current
DL low
1.6
4
DL high
DH low, BST - LX = 5V
DH high, BST - LX = 5V
DL - PGND = 2.5V
VDDP - DL = 2.5V
DH - LX = 2.5V, BST - LX = 5V
2
4
2
4
2
DL Source Current
1
A
DH Sink Current
1
A
DH Source Current
BST - DH = 2.5V,
BST - LX = 5V
1
A
Notes:
(1) When the inductor is in continuous conduction mode, the output voltage will have a DC regulation level higher
than the error-comparator threshold by 50% of the ripple voltage.
(2) Using a current sense resistor, this measurement relates to PGND minus the voltage of the source on the
low-side MOSFET.
(3) This device is ESD sensitive. Use of ESD handling precautions is required.
(4) Measured in accordance with JESD51-1, JESD51-2 and JESD51-7.
2006 Semtech Corp.
4
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