X RP7 6 6 5
3 A 1 8 V S y n c h r o n o u s S t e p - D o w n Co n v e r t e r
ABSOLUTE MAXIMUM RAT
INGS
OPERATING RATINGS
Input Voltage V
IN
................................
....... 4.50V to 18 V
Ambient Operating
Temperature ................
- 40°C to 85 °C
Maximum Output Current
................................
.... 3A min
...... 60 °C/W
JA
................................
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 con ditions for extended periods of time may affect
reliability.
Supply Voltage V
IN
................................
...... - 0.3V to 20 V
Switch Node Voltage V
SW
................................
......... 21 V
Boost Voltage V
BS
................................
... - 0.3 to V
SW
+6 V
Enable Voltage V
EN
................................
......... - 0.3 to V
IN
All Other Pins ................................
.............. - 0.3 to +6 V
Junction Temperature
................................
.......... 150°C
Storage Temperature ..............................
- 65°C to 150°C
Lead Temperature (Soldering, 10 sec)
...................
26 0°C
ESD Rating (HBM - Human Body Model) ....................
2kV
ESD Rating (MM - Machine Model) ...........................
200V
Moisture Sensitivity Level (MSL)
................................
... 3
ELECTRICAL SPECIFICA
TIONS
Specifications are for an Operating
Ambient Temperature of T
A
= 25°C only; limits applying over the full
Ambient Operating
T
d 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
= V
EN
= 12 V, V
OUT
=3.3V .
IN
Parameter
Shutdown Supply Current
Quiescent Current
Feedback Voltage
V
FB
0.90 7
- 0.1
EA
Min.
Typ.
0.1
1.2
0.925
1.1
Max.
10
1. 4
0.9 43
0.1
Units
µA
mA
V
V
µA
V/V
µA/V
I
SW
=0.2A&0.7A
V
FB
=1V
V
EN
0.75 V
Conditions
V
EN
= 3V, V
FB
=1V
Feedback Overvoltage Threshold
Feedback Bias Current
Error Amplifier
(Note 1)
Voltage Gain A
400
800
100
100
0.1
4.3
5.6
1.4
5.2
280
340
90
90
0
2.2
2.5
210
3.65
4.00
4. 25
2.7
400
10
Error Amplifier
Transconductance G
EA
High - Side switch On Resistance
R
DSONH
(Note 2)
Low - Side switch On Resistance
R
DSONL
(Note 2)
High - Side switch Leakage
Current
High - Side Switch Current Limit
Low - Side Switch Current Limit
COMP to Current Sense
Transconductance G
CS
Oscillator Frequency
F
OSC1
Short Circuit Oscillator
Frequency F
OSC2
Maximum Duty
Cycle D
MAX
MIN
I
SW
= - 0.2A& -0.7A
µA
A
A
A/V
kHz
kHz
%
%
V
mV
V
V
IN
Rising
V
FB
=0.85V
V
FB
=1V
From Drain to Source
V
IN
=18V, V
EN
=0V,
V
SW
=0V
Minimum Duty Cycle D
EN Enable Threshold Voltage
EN Enable Threshold Voltage
Hysteresis (Note 1)
UVLO Threshold
© 2013 Exar Corporation
2/ 12
Rev. 2.0. 1
EXAR [ EXAR CORPORATION ]
