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ISL6273 Datasheet(PDF) 2 Page - Intersil Corporation

Part No. ISL6273
Description  1.2A Low Quiescent Current 1.5MHz High Efficiency Synchronous Buck Regulator
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Maker  INTERSIL [Intersil Corporation]
Homepage  http://www.intersil.com/cda/home
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ISL6273 Datasheet(HTML) 2 Page - Intersil Corporation

 
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2
FN9256.0
March 7, 2006
Absolute Maximum Ratings (Reference to SGND)
Thermal Information
Supply Voltage (PVIN, VCC) . . . . . . . . . . . . . . . . . . . . -0.3V to 6.5V
EN, RSI, MODE, PHASE, POR . . . . . . . . . . . . . -0.3V to VCC+0.3V
FB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 2.7V
PGND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 0.3V
Recommended Operating Conditions
PVIN Supply Voltage Range . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V
Load Current Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0A to 1.2A
Ambient Temperature Range . . . . . . . . . . . . . . . . . . . .-40°C to 85°C
Thermal Resistance (Notes 1, 2)
θJA (°C/W) θJC (°C/W)
3x3 DFN Package . . . . . . . . . . . . . .
44
5.5
Junction Temperature Range. . . . . . . . . . . . . . . . . . . -40°C to 125°C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . -65°C to 150°C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300°C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1.
θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
Tech Brief TB379.
2.
θJC, “case temperature” location is at the center of the exposed metal pad on the package underside. See Tech Brief TB379.
Electrical Specifications
Unless otherwise noted, all parameter limits are guaranteed over the recommended operating conditions and
the typical specification are measured at the following conditions: TA = 25°C, VPVIN = VVCC = 3.6V, EN = VCC,
RSI = 0V, MODE = VCC, L = 1.8
µH, C1 = 10µF, C2 = 10µF, IOUT = 0A (see the Typical Application Circuit).
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
SUPPLY
VCC Undervoltage Lockout Threshold
VUVLO
Rising
-
2.5
2.7
V
Falling
2.2
2.4
-
V
Quiescent Supply Current
IPVIN
MODE = VCC, no load at the output
-
25
50
µA
MODE = SGND, no load at the output
-
5
8
mA
Shut Down Supply Current
ISD
VCC = PVIN = 5.5V, EN = low
-
0.1
2
µA
OUTPUT REGULATION
FB Regulation Voltage
VFB
TA = 0°C to 85°C
0.784
0.8
0.816
V
TA = -40°C to 85°C
0.78
0.8
0.82
V
FB Bias Current
IFB
FB = 0.75V
-
0.1
-
µA
Output Voltage Accuracy
PVIN = VO + 0.5V to 5.5V, Io = 0 to 1.2A ,
TA = -40°C to 85°C
-3
-
3
%
Line Regulation
PVIN = VO + 0.5V to 5.5V (minimal 2.7V)
-
0.2
-
%/V
Maximum Output Current
1.2
-
-
A
COMPENSATION
Error Amplifier Trans-conductance
Adjustable version, design info only
-
20
-
µA/V
PHASE
P-Channel MOSFET On Resistance
PVIN = 3.6V, Io = 200mA
-
0.12
0.22
PVIN = 2.7V, Io = 200mA
-
0.16
0.27
N-Channel MOSFET On Resistance
PVIN = 3.6V, Io = 200mA
-
0.11
0.22
PVIN = 2.7V, Io = 200mA
-
0.15
0.27
P-Channel MOSFET Peak Current Limit
IPK
1.5
2.1
2.6
A
PHASE Maximum Duty Cycle
-
100
-
%
PWM Switching Frequency
fS
TA = -40°C to 85°C
1.35
1.5
1.75
MHz
PHASE Minimum On Time
MODE = low (forced PWM mode)
-
-
140
ns
Soft Start-Up Time
-
1.1
-ms
ISL6273


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