ISL8502 データシートの表示（PDF） - Renesas Electronics
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ISL8502 Datasheet PDF : 19 Pages
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ISL8502
Electrical Specifications
PARAMETER
Refer to Block and Simplified Power System Diagrams and Typical Application Schematics. Operating
Conditions Unless Otherwise Noted: VIN = 12V, or VCC = 5V ±10%, TA = -40°C to +85°C. Typical are at
TA = +25°C. (Continued)
SYMBOL
TEST CONDITIONS
MIN
MAX
(Note 7) TYP (Note 7) UNITS
PWM Frequency
fOSC
RT = 96k
RT = 40k
FS pin tied to VCC
400 500 600 kHz
960 1200 1440 kHz
800
kHz
Ramp Amplitude
Ramp Amplitude
Modulator Gain
Maximum Duty Cycle
Maximum Duty Cycle
REFERENCE VOLTAGE
VOSC
VOSC
VVIN/VOSC
DMAX
DMAX
VIN = 14V
VIN = 5V
By Design
fOSC = 500kHz
fOSC = 1.2MHz
1.0
V
0.470
V
8
-
88
%
76
%
Reference Voltage
System Accuracy
VREF
0.600
V
-1.0
+1.0
%
FB Pin Bias Current
±80 ±200 nA
SOFT-START
Soft-Start Current
ISS
Enable Soft-Start Threshold
20
30
40
µA
0.8
1.0
1.2
V
Enable Soft-Start Threshold Hysteresis
12
mV
Enable Soft-Start Voltage High
2.8
3.2
3.8
V
ERROR AMPLIFIER
DC Gain
88
dB
Gain-Bandwidth Product
GBWP
15
MHz
Maximum Output Voltage
3.9
4.4
V
Slew Rate
SR
5
V/µs
INTERNAL MOSFETS
Upper MOSFET rDS(ON)
Lower MOSFET rDS(ON)
PGOOD
rDS_Upper
rDS_Lower
VCC = 5V
VCC = 5V
180
m
90
m
PGOOD Threshold
VFB/VREF
Rising Edge Hysteresis 1%
Falling Edge Hysteresis 1%
107
111
115
%
86
90
93
%
PGOOD Rising Delay
PGOOD Leakage Current
PGOOD Low Voltage
PGOOD Sinking Current
PROTECTION
tPGOOD_DELAY
VPGOOD
IPGOOD
fOSC = 500kHz
VPGOOD = 5.5V
250
ms
5
µA
0.10
V
0.5
mA
Positive Current Limit
IPOC_peak
IOC from VIN to PHASE (Notes 5, 6)
(TA = 0°C to +85°C)
IOC from VIN to PHASE (Notes 5, 6)
(TA = -40°C to +0°C)
2.1
3.5
4.5
A
2.0
3.4
4.0
A
FN6389 Rev 2.00
June 29, 2010
Page 6 of 19
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