S P613 4
600kHz Synchronous PWM Step Down Controller
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
.......................................................................... 7V
BST ...................................................................... 22V
BST-SWN ......................................................-0.3 to 7V
SWN ............................................................-1V to 15V
GH................................................... -0.3V to BST+0.3V
GH-SWN.................................................................. 7V
All other pins ..................................... -0.3V to V
CC
+0.3V
GH, GL peak output current <10us..............................2A
Storage Temperature ..............................-65°C to 150°C
Power Dissipation.................................Internally Limited
ESD Rating BST Pin (HBM - Human Body Model)...... 1.5kV
ESD Rating All Other Pins (HBM) ............................... 2kV
Thermal Resistance
θ
JA
....................................41.9°C/W
Operating Voltage Range ................................ 3V to 15V
ELECTRICAL SPECIFICATIONS
Specifications with standard type are for an Operating Junction Temperature of T
J
= 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 T
J
= 25°C, and are provided for
reference purposes only. Unless otherwise indicated, V
cc
= 4.5V to 5.5V, BST= V
cc
, SWN=GND=0V, UVIN=3V, CV
cc
= 10µF,
C
COMP
=0.1uF, CGH=CGL=3.3nF, C
SS
=50nF, T
A
= –40°C to 85°C (SP6134EU) or T
A
= –0°C to 70°C (SP6134CU).
Parameter
V
CC
Supply Current
BST Supply Current
V
CC
UVLO Start Threshold
V
CC
UVLO Hysteresis
UVIN Start Threshold
UVIN Hysteresis
UVIN Input Current
Error Amplifier Reference
Error Amplifier Reference
Over Line and Temperature
Error Amplifier
Transconductance
Error Amplifier Gain
COMP Sink Current
COMP Source Current
VFB Input Bias Current
Internal Pole
COMP Clamp
COMP Clamp Temp. Coefficient
Ramp Amplitude
RAMP Offset
RAMP Offset Temp. Coefficient
GH Minimum Pulse Width
Maximum Controllable Duty
Ratio
Maximum Duty Ratio
Internal Oscillator Frequency
SS Charge Current:
92
100
510
600
10
690
0.92
0.792
0.788
0.800
0.800
6
60
150
150
50
4
2.5
-2
1.10
1.1
-2
90
97
180
1.28
200
4.00
100
2.30
260
Min.
Typ.
1.5
0.2
4.25
200
2.50
300
Max.
3
0.4
4.50
300
2.65
390
1
0.808
0.812
Units
mA
mA
V
mV
V
mV
uA
V
V
mS
dB
uA
uA
nA
MHz
V
mV/°C
V
V
mV/°C
ns
%
%
kHz
uA
•
•
•
Maximum Duty Ratio Measured just
before pulse skipping begins
Valid for 20 Cycles
•
TA = 25°C, RAMP COMP until GH starts
switching
VFB=0.7V, TA = 25°C
•
No Load
VFB=0.9V, COMP=0.9V
VFB=0.7V, COMP=2.2V
VFB=0.8V
•
UVIN=3.0V
2X Gain Config., Measure VFB, V
CC
=5V,
T=25°C
•
•
•
Conditions
VFB =0.9V (No switching)
VFB =0.9V (No switching)
© 2008 Exar Corporation
2/15
Rev. 2.0.0
EXAR [ EXAR CORPORATION ]
