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參數(shù)資料
| 型號： | ISL8502IRZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2.5A Synchronous Buck Regulator with Integrated MOSFETs |
| 中文描述： | 4 A SWITCHING REGULATOR, 1440 kHz SWITCHING FREQ-MAX, PQCC24 |
| 封裝： | 4 X 4 MM, ROHS COMPLIANT, PLASTIC, QFN-24 |
| 文件頁數(shù)： | 5/19頁 |
| 文件大小： | 526K |
| 代理商： | ISL8502IRZ |
5
FN6389.0
January 17, 2007
Absolute Maximum Ratings
Thermal Information
VIN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to +16.5V
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to +6.0V
Absolute Boot Voltage, V
BOOT
. . . . . . . . . . . . . . . . . . . . . . . +22.0V
Upper Driver Supply Voltage, V
BOOT
- V
PHASE
. . . . . . . . . . . +6.0V
All other Pins . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to VCC + 0.3V
Recommended Operating Conditions
Supply Voltage on VIN. . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V to 14V
Ambient Temperature Range. . . . . . . . . . . . . . . . . . -40°C to +85°C
Junction Temperature Range. . . . . . . . . . . . . . . . . -40°C to +125°C
Thermal Resistance
QFN Package (Notes 1, 2) . . . . . . . . .
Maximum Junction Temperature (Plastic Package) . . . . . . +150°C
Maximum Storage Temperature Range. . . . . . . . . -65°C to +150°C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . +300°C
(SOIC - Lead Tips Only)
θ
JA
(°C/W)
39
θ
JC
(°C/W)
2.5
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.
150°C max junction temperature is intended for short periods of time to prevent shortening the lifetime. Operation close to 150°C junction may trigger the shutdown of
the device even before 150°C, since this number is specified as typical.
NOTE:
1.
θ
JA
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. For
θ
JC
, the “case temp” location is the center of the exposed metal pad on the package underside.
3. Not production tested.
4. Minimum V
IN
can operate below 5.5V as long as VCC is greater than 4.5V.
5. Maximum V
IN
can be higher than 14V voltage stress across the upper and lower do not exceed 15.5V in all conditions.
6. Circuit requires 100ns minimum on time to detect over current condition.
Electrical Specifications
Refer to Block and Simplified Power System Diagrams and Typical Application Schematics. Operating
Conditions Unless Otherwise Noted: Vin = 12V, or V
CC
= 5V
±
10%, T
A
= -40°C to +85°C. Typical are at
T
A
= +25°C.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
V
IN
SUPPLY
Input Voltage Range
V
IN
5.5
4
14
5
V
V
IN
tied to VCC
4.5
5.5
V
Input Operating Supply Current
I
Q
V
FB
= 1.0V
7
mA
Input Standby Supply Current
I
Q_SBY
EN tied to GND, V
IN
= 14V
1.25
2
mA
SERIES REGULATOR
VCC Voltage
V
PVCC
V
IN
> 5.6V
4.5
5.0
5.5
V
Maximum Output Current
I
PVCC
V
IN
= 12V
50
mA
VCC Current Limit
V
IN
= 12V, VCC shorted to PGND. Note 3
300
mA
POWER-ON RESET
Rising VCC POR Threshold
4.2
4.4
4.49
V
Falling VCC POR Threshold
3.85
4.0
4.10
V
ENABLE
Rising Enable Threshold Voltage
V
EN_Rising
2.7
V
Falling Enable Threshold Voltage
V
EN_Fall
2.3
V
Enable Sinking Current
I
EN
500
μ
A
OSCILLATOR
PWM Frequency
f
OSC
R
T
= 96k
Ω
400
500
600
kHz
R
T
= 40k
Ω
960
1200
1440
kHz
FS pin tied to VCC
800
kHz
Ramp Amplitude
Δ
V
OSC
V
IN
= 14V
1.0
V
ISL8502
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