XRP6142 Datasheet, PDF (2/17 Pages) Exar Corporation – Synchronous Step-Down Controller with DDR

XRP6142
Synchronous Step-Down Controller with DDR
Memory Termination
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only, and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect
reliability.
V_CC ...................................................................... 7.0V
V_IN ....................................................................... 7.0V
BST ....................................................................13.5V
SW .............................................................-1V to 7.0V
BST-SW ......................................................-0.3V to 6V
All other pins ..................................... -0.3V to V_CC+0.3V
Storage Temperature .............................. -65°C to 150°C
Power Dissipation ................................ Internally Limited
Lead Temperature (Soldering, 10 sec) ................... 300°C
ESD Rating (HBM - Human Body Model) .................... 2kV
ESD Rating (MM - Machine Model) ...........................500V
OPERATING RATINGS
Input Voltage Range V_CC ..............................3.0V to 5.5V
Input Voltage Range V_IN...............................1.0V to 5.5V
Junction Temperature Range ....................-40°C to 125°C
Thermal Resistance θ_JA ................................... 33.3°C/W
ELECTRICAL SPECIFICATIONS
Specifications are for an Operating Junction Temperature of T_J = 25°C; limits applying over the full Operating Junction
Temperature range are denoted by a “•”. Minimum and Maximum limits are guaranteed through test, design, or statistical
correlation. Typical values represent the most likely parametric norm at T_J = 25°C, and are provided for reference purposes
only. Unless otherwise indicated, V_CC = V_IN = 3.3V.
Parameter
V_REF, Reference Voltage
V_FB offset
V_REFIN, Voltage Range
V_DDQ/2, Input Impedance
V_TTREF , Output Error
V_TTREF Current Limit
I_Q, Operating Quiescent Current
I_OFF, Shutdown current
T_ON, Switch On-Time
T_{OFF_MIN}, Minimum Off-Time
T_D, Gate Drive Dead-Time
V_{IH_EN}, EN Pin Rising Threshold
V_{EN_HYS}, EN Pin Hysteresis
I_FB, Feedback Pin Bias Current
V_CCUVLO, Under-Voltage Lockout
V_{CCUVLO_HYS}, Under-Voltage Lock
out Hysteresis
V_{SC_TH}, Feedback Pin Short
Circuit Latch Threshold
ILIM Pin Source Current
ILIM Current Temperature
Coefficient
V_ILIM Current Limit Trip Level
Current Limit Blanking
Min.
0.495
0.492
VREF
-1.25
±20
0.4
0.8
1.6
1.15
55
42.5
-20
Typ.
0.5
0.5
7
60
±40
400
0.1
0.5
1.0
2.0
300
50
1.2
50
50
2.8
500
65
50
0.3
0
130
Max.
0.505
0.508
1.3
+1.25
±65
600
0.6
1.2
2.4
400
1.25
200
3.0
75
57.5
+20
Units
V
V
mV
V
MΩ
%
mA
µA
µA
µs
ns
ns
V
mV
nA
V
mV
%
µA
%/C
mV
ns
Conditions
•
V_REFIN = V_REF
• V_DDQ/2 = 0.75V, I_VTTR=0mA
• ^{Sourcing: VTTREF=0, VDDQ/2=VREF}
Sinking: V_TTREF=2V
Not switching, V_FB=V_REFIN+0.1V
EN=0V
• XR6142EL0-5-F (T_ON=500ns)
• XR6142EL1-0-F (T_ON=1000ns)
• XR6142EL2-0-F (T_ON=2000ns)
• All T_ON options
•
V_FB=2.0V
• V_CC rising edge
• % of VREFIN
•
GL Rising > 1.0V
© 2010 Exar Corporation
Page 2 of 17
Rev. 1.0.0