SC2688 Datasheet, PDF (2/12 Pages) Semtech Corporation – Programmable Synchronous DC/DC Converter, Dual LDO Controller

SC2688
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 implied.
Parameter
Symbol
Maximum
Units
VCC to AGND
PGND to AGND
V_IN
-0.3 to +7
V
±1
V
BST to PGND
-0.3 to +15
V
DH to PGND, DL to PGND (Note2)
-1 to +15
V
Operating Temperature Range
Junction Temperature Range
Storage Temperature Range
Lead Temperature (Soldering) 10 Sec.
Thermal Resistance Junction to Ambient
Thermal Impedance Junction to Case
T_A
T_J
T_STG
T_LEAD
θ_JA
θ_JC
0 to +70
0 to +125
-65 to +150
300
80
25
°C
°C
°C
°C
°C/W
°C/W
Electrical Characteristics
Unless specified: VCC = 4.75V to 5.25V; GND = PGND = 0V; VOSENSE = V_O; 0mV < (CS+-CS-) < 60mV; LDOV = BST = 11.4V to 12.6V; T_A = 0 to 70°C
Parameter
Conditions
Min
Typ
Max
Units
Switching Section
Output Voltage
Supply Voltage
I_O = 2A in Application Circuit
VCC
1.238 1.250
1.263
V
4.5
7
V
Supply Current
VCC = 5.0V
8
15
mA
Load Regulation
Line Regulation
I_O = 0.8A to 15A
1
%
±0.5
%
Current Limit Voltage
60
70
85
mV
Oscillator Frequency
120
140
160
kHz
Oscillator Max Duty Cycle
90
95
%
Peak DH Sink/Source Current BSTH - DH = 4.5V, DH- PGNDH = 3.3V
1
A
DH- PGNDH = 1.5V
100
mA
Peak DL Sink/Source Current BSTL - DL = 4.5V, DL - PGNDL= 3.3V
1
A
DL- PGNDH = 1.5V
100
mA
Gain (A_OL)
FB Input current
Dead Time
VOSENSE to V_O
V_FB = 1.25V
35
dB
1
2
uA
40
100
ns
 2004 Semtech Corp.
2
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