SC198 Datasheet, PDF (2/16 Pages) Semtech Corporation – Dual DC-DC Buck Converter with High Current Capability

SC198
POWER MANAGEMENT
Absolute Maximum Ratings
Exceeding the specifications below may result in permanent damage to the device or device malfunction. Operation outside of the parameters specified in the
Electrical Characteristics section is not recommended.
Parameter
Symbol
Maximum
Units
VIN
V_IN
-0.3 to 7
V
EN, SYNC Input
V_EN V_{, SYNC}
-0.3 to V_IN +0.3
V
LXA and LXB Voltages
V_LXA, V_LXB
-1 to V_IN +1
V
VOUT
V_OUT
-0.3 to V_IN +0.3
V
CTLA0, CTLA1, CTLA2, CTLB0, CTLB1 & CTLB2 Voltages
-0.3 to V_IN +0.3
V
Output Short Circuit to GND
t_SC
Indefinite
s
LXA and LXB Currents
I_LXA and I_LXB
1.2
A
Thermal Impedance (Junction to Ambient)⁽¹⁾
θ_JA
40
ºC/W
Operating Ambient Temperature
T_A
-40 to +85
ºC
Maximum Junction Temperature
T_J
150
ºC
Storage Temperature
T_S
-65 to +150
ºC
Reflow Solder Temperature
T_PKG
260
°C
ESD Protection Level⁽²⁾
V_ESD
2
kV
Note:
(1) Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under the exposed pad as per JESD51 standards.
(2) Tested according to JEDEC standard JESD22-A114-B.
Electrical Characteristics
Unless otherwise noted: V_IN = 3.6V, SYNC = V_IN, L = 4.7μH, C = 10μF, T_A = -40°C to +85°C. Typical values are at T_A = 25°C.
Parameter
Symbol
Conditions
Min Typ Max Units
Input Voltage Range
VOUT Accuracy⁽¹⁾
Line Regulation
Load Regulation
Minimum Duty Cycle
LXA, LXB Current Limit
Quiescent Current
Shutdown Current
LXA and LXB
Leakage Current
P-Channel On Resistance
N-Channel On Resistance
V_IN
2.7
∆V_OUT
I_OUT = 10mA to 600mA
-3
V_LINEREG V_IN = 2.7 to 5.5V, V_OUT = 1.8V, I_OUT = 300mA
V_LOADREG
I_OUT = 10mA to 600mA
DC_MIN
I_LIM
0.9
I_Q
I_OUT = 0mA, SYNC = 0, ENA, ENB = V_IN
I_SD
ENA, ENB = 0, LXA, LXB = Open
V_IN = 5.5V, LX = 0V, PMOS
I_LXA, I_LXB
V_IN = 5.5V, LX = V_IN, NMOS
-2
R_DSP
I_LXA, I_LXB = 100mA
R_DSN
I_LXA, I_LXB = 100mA
5.5
V
3
%
0.2 %/V
0.0008 %/mA
18
%
A
50
μA
0.1
1
μA
0.1
1
μA
0.1
μA
0.35
Ω
0.25
Ω
© 2006 Semtech Corp.
2
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