SC1486A Datasheet, PDF (5/29 Pages) Semtech Corporation – Dual Synchronous Buck DDR and DDR2 Power Supply Controller

SC1486A
POWER MANAGEMENT
Electrical Characteristics (Cont.)
Test Conditions: V_BAT = 15V, EN/PSV1 = 5V, REFIN=1.25V, VCCA1 = VDDP1 = VCCA2 =VDDP2= 5.0V, V_VDDQ = 2.5, V_VTT = 1.25, R_TON1 = 1M, R_TON2 = 1M
Parameter
Conditions
25°C
-40°C to 125°C Units
Min Typ Max Min Max
Gate Drivers
Shoot-Through Delay ⁽⁴⁾
DH or DL rising
30
DL Pull-Down Resistance
DL low
0.8
DL Sink Current
DL = 2.5V
3.1
DL Pull-Up Resistance
DL high
2
DL Source Current
DL = 2.5V
1.3
DH Pull-Down Resistance
DH low, BST - LX = 5V
2
DH Pull-Up Resistance
DH high, BST - LX = 5V
2
DH Sink/Source Current
DL = 2.5V
1.3
ns
1.6
Ω
Α
4
Ω
A
4
Ω
4
Ω
A
Notes:
(1) 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) clks = switching cycles.
(4) Guaranteed by design. See Shoot-Through Delay Timing Diagram below.
(5) Measured in accordance with JESD51-1, JESD51-2 and JESD51-7.
(6) This device is ESD sensitive. Use of standard ESD handling precautions is required.
Shoot-Through Delay Timing Diagram
LX
DH
DL
DL
tplhDL
tplhDH
 2004 Semtech Corp.
5
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