XRP6658 Datasheet, PDF (2/11 Pages) Exar Corporation – 1A 1.5MHz PFM/PWM Synchronous Step-Down Converter

XRP6658
1A 1.5MHz PFM/PWM Synchronous Step-Down Converter
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.
Input Voltage V_IN ...................................... -0.3V to 6.0V
EN, V_FB Voltages .......................................... -0.3V to V_IN
SW Voltage.................................... -0.3V to (V_IN + 0.3V)
Storage Temperature .............................. -65°C to 150°C
Lead Temperature (Soldering, 10 sec) ................... 260°C
ESD Rating (HBM - Human Body Model) .................... 2kV
ESD Rating (MM - Machine Model) ...........................200V
Junction Temperature (Notes 1, 3) ....................... 150°C
OPERATING RATINGS
Input Voltage Range V_IN...............................2.5V to 5.5V
Operating Temperature Range .................. -40°C to 85°C
Thermal Resistance ......................................................
θ_JA (5 Pin SOT23) .......................................134.5°C/W
θ_JC (5 Pin SOT23) ........................................... 81°C/W
ELECTRICAL SPECIFICATIONS
Specifications with standard type are for an Ambient Temperature of T_A = 25°C only; limits applying over the full Operating
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_A = 25°C, and are provided for reference purposes
only. Unless otherwise indicated, V_IN = 3.6V, T_A= 25°C.
Parameter
Input Voltage Range
Feedback Current
Regulated Feedback Voltage
Output Voltage Accuracy
Output Voltage Accuracy
Reference Voltage Line Regulation
Reference Voltage Line Regulation
Output Voltage Line Regulation
Output Voltage Line Regulation
Peak Inductor Current
PWM Quiescent Current (Note 2)
PFM Quiescent Current
Shutdown
Oscillator Frequency
Short-Circuit Oscillator Frequency
R_DS(ON) of PMOS
R_DS(ON) of NMOS
Under Voltage Lock Out
SW Leakage
Enable Threshold
Shutdown Threshold
EN Leakage Current
Min.
2.5
0.588
-3
-3
1.5
1.2
0.4
Typ.
0.600
2.3
188
15
0.1
1.5
900
0.24
0.21
1.8
Max.
5.5
+100
0.612
+3
+3
0.4
0.4
0.4
0.4
1
1.8
+1
1.2
+1
Units
V
nA
V
%
%
%/V
%/V
%/V
%/V
A
µA
µA
µA
MHz
kHz
Ω
Ω
V
µA
V
V
µA
Conditions
I_OUT=100mA, V_IN = 2.5V to 3.0V
• I_OUT=100mA, V_IN = 3.0V to 5.5V
V_IN = 2.5V to 3.0V
• V_IN = 3.0V to 5.5V
V_IN = 2.5V to 3.0V
• V_IN = 3.0V to 5.5V
V_FB = 0.5V or V_OUT = 90%
V_FB = 0.5V or V_OUT = 90%
V_FB = 0.65V or V_OUT = 108%
V_RUN = 0V, V_IN = 4.2V
• V_FB = 0.6V or V_OUT = 100%
• V_FB = 0V or V_OUT = 0V
I_SW = 100mA
I_SW = –100mA
V_RUN = 0V, V_SW = 0V or 5V, V_IN = 5V
•
•
•
Note 1: T_J is a function of the ambient temperature T_A and power dissipation P_D: (T_J = T_A + (P_D * θ_JA))
Note 2: Dynamic quiescent current is higher due to the gate charge being delivered at the switching frequency.
Note 3: This IC is built-in over-temperature protection to avoid damage from overload conditions.
Note 4: θ_JA is measured in the natural convection at T_A=25 on a high effective thermal conductivity test board (2 layers,
2S0P) of JEDEC 51-5 thermal measurement standard.
Note 5: θ_JC represents the resistance to the heat flows the chip to package top case.
© 2011 Exar Corporation
2/11
Rev. 1.5.0