ISL6439 Datasheet, PDF (5/15 Pages) Intersil Corporation – Single Sync Buck PWM Controller for Broadband Gateway Applications

ISL6439, ISL6439A
Absolute Maximum Ratings
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+7V
Absolute Boot Voltage, V_BOOT . . . . . . . . . . . . . . . . . . . . . . . +15.0V
Upper Driver Supply Voltage, V_BOOT - V_PHASE . . . . . . . . . . . +6.0V
Input, Output or I/O Voltage . . . . . . . . . . GND - 0.3V to VCC + 0.3V
Operating Conditions
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . +3.3V ±10%
Ambient Temperature Range . . . . . . . . . . . . . . . . . . .-40°C to +85°C
Junction Temperature Range. . . . . . . . . . . . . . . . . .-40°C to +125°C
Thermal Information
Thermal Resistance
θ_JA (°C/W) θ_JC (°C/W)
SOIC Package (Note 1) . . . . . . . . . . . .
67
N/A
QFN Package (Note 2). . . . . . . . . . . . .
35
5
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C
Pb-Free Reflow Profile. . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
For Recommended soldering conditions see Tech Brief TB389.
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
NOTE:
1. θ_JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
2. θ_JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. θ_JC, the
“case temp” is measured at the center of the exposed metal pad on the package underside. See Tech Brief TB379.
3. Limits established by characterization and are not production tested.
Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted V_CC = 3.3V±5% and T_A = +25°C
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
VCC SUPPLY CURRENT
Nominal Supply
POWER-ON RESET
I_BIAS
6.1
6.9
7.7
Rising CPVOUT POR Threshold
POR Commercial
4.25
4.30
4.42
Industrial
4.10
4.30
4.50
CPVOUT POR Threshold Hysteresis
0.3
0.6
0.9
OSCILLATOR
Frequency
f_OSC
IC = ISL6439C, Commercial
IC = ISL6439I, Industrial
275
300
325
250
300
340
IC = ISL6439AC, Commercial
554
600
645
IC = ISL6439AI, Industrial
524
600
650
Ramp Amplitude
REFERENCE
ΔV_OSC
-
1.5
-
Reference Voltage Tolerance
-
-
1.5
Nominal Reference Voltage
Charge Pump
V_REF
-
0.800
-
Nominal Charge Pump Output
Charge Pump Output Regulation
V_CPVOUT V_VCC = 3.3V, No Load
-
5.1
-
-
2
-
ERROR AMPLIFIER
DC Gain
Note 3
-
88
-
Gain-Bandwidth Product
GBWP
-
15
-
Slew Rate
SR
-
6
-
SOFT START
Soft Start Slew Rate
Commercial
6.2
7.3
Industrial
6.2
7.6
UNITS
mA
V
V
V
kHz
kHz
kHz
kHz
V_P-P
%
V
V
%
dB
MHz
V/μs
ms
ms
5
FN9057.5
November 5, 2008