XRP6670 Datasheet, PDF (2/13 Pages) Exar Corporation – 3A 300kHz-2.5MHz Synchronous Step Down Regulator

XRP6670
3A 300kHz-2.5MHz Synchronous Step Down Regulator
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.
VDD, PVDD, FB, COMP, SHDN/RT ................... -0.3V to 6.0V
SW ................................................... -0.3V to VDD+0.3V
Junction Temperature Range...............................+150°C
Storage Temperature .............................. -65°C to 150°C
Power Dissipation ................................ Internally Limited
Lead Temperature (Soldering, 10 sec) ................... 260°C
ESD Rating (HBM - Human Body Model) .................... 2kV
ESD Rating (MM - Machine Model) ...........................200V
OPERATING RATINGS
Input Voltage Range VIN...............................2.6V to 5.5V
Maximum Output Current (Min.) .................................3A
Junction Temperature Range ................. -40°C to +125°C
Thermal Resistance ......................................................
DFN10 θJA ....................................................110°C/W
DFN10 θJC ....................................................... 3°C/W
Note 1: TJ is a function of the ambient temperature TA and
power dissipation PD: (TJ = TA + (PD * θJA))
ELECTRICAL SPECIFICATIONS
Specifications are for an Operating Junction Temperature of TA = TJ = 25°C only; 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 TJ = 25°C, and are provided for reference
purposes only. Unless otherwise indicated, VDD = VPVDD = 3.3V, TA= TJ = 25°C.
Parameter
Supply Current
Shutdown Supply Current
Under Voltage Lockout (UVLO)
Threshold
Under Voltage Lockout (UVLO)
Hysteresis
Feedback Voltage VFB
FB Pin Bias Current
Current Sense Transresistance
Switching Leakage Current
Error Amplifier Voltage Gain
Error Amplifier Trans-
conductance
RT Pin Voltage
Switching Frequency Range
Maximum Duty Cycle
Minimum On-Time
Switch Current Limit
Switching FET On Resistance
Synchronous FET On Resistance
Shutdown Threshold
PGOOD Voltage Range
PGOOD Pull Down Resistance
Output Current
Output Voltage Line Regulation
Output Voltage Load Regulation
Soft Start Time
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
Min.
0.784
0.760
0.3
0.8
100
3.2
-15
3
Typ.
460
2.2
300
0.800
0.1
0.2
800
800
0.800
1
Max.
1
0.816
0.4
1
0.840
2.5
1.2
120
4.2
0.11
0.11
VDD-0.7
150
0.16
0.17
VDD-0.4
+15
120
0.4
±0.2
1.5
160
20
Units
µA
µA
V
mV
V
µA
Ω
µA
V/V
µA/V
V
MHz
%
ns
A
Ω
Ω
V
%
Ω
A
%/V
%
ms
°C
°C
Conditions
VFB=0.75V, No switching
SHDN/RT=VDD=VPVDD=5.5V
VDD rising
SHDN/RT=VDD=5.5V
Programmed via ROSC
ROSC=330kΩ
VFB=0.75V
VFB=0.75V
ISW=500mA
ISW=500mA
VDD= 2.6V to 5.5V, VOUT= 2.5V
VDD= 2.7V to 5.5V, IOUT= 100mA
IOUT= 10mA to 3A
IOUT= 10mA
© 2013 Exar Corporation
2/13
Rev. 1.0.1