 English |
|
|
|
|
|
|
|
| SP6669 Datasheet, PDF (3/10 Pages) Exar Corporation – 1.5MHZ, 600mA SYNCHRONOUS STEP DOWN CONVERTER | |||
| |||
| ◁ |
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings
These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for
prolonged time periods may affect device reliability. All voltages are with respect to ground.
Input Voltage VIN ..........................-0.3V to 6V
EN VFB Voltage ............................ -0.3V to VIN
SW Voltage.................... -0.3V to (VIN + 0.3V)
PMOS Switch Source Current (DC) ........ 800mA
Operating Junction Temp. (Note 1)......... 125ºC
Storage Temp. Range TSTG ....... -65ºC to 150ºC
Lead Temperature (sold. 10s) TLEAD ........ 300ºC
Thermal Resistance
NMOS Switch Sink Current (DC) ........... 800mA RθJA ............................................... 250ºC/W
Peak Switch Sink and Source Current ....... 1.3A RθJC .................................................90ºC/W
Note 1: TJ is a function of the ambient temperature TA and power dissipation PD (TJ= TA + PD x 250°C/W).
Recommended Operating Conditions
Operating Temperature TOP ....... -40ºC to 85 ºC Input voltage VIN......................... 2.5V to 5.5V
VIN=3.6V, TA=25ºC, unless otherwise specified â Boldface characters apply over the full temperature range.
Parameter
Symbol
Conditions
Min
Typ.
Max
Unit
Feedback Current
IVFB
±30
nA
Regulated Feedback Voltage
Reference Voltage Line
Regulation
VFB
ÎVFB
TA=25°C
VIN=2.5V to 5.5V
0.588
0.600
0.612
0.4
V
%/V
Output Voltage Accuracy
ÎVOUT%
-3
+3
%
Output Over-Voltage
Lockout
Output Voltage Line
Regulation
ÎVOVL
ÎVOVL = VOVL â VFB (Adj.)
20
50
80
mV
ÎVOVL = VOVL â VOUT (Fixed)
2.5
7.8
13
%
ÎVOUT
VIN=2.5V to 5.5V
0.4
%/V
Peak Inductor Current
IPK
VIN=3V, VFB=0.5V or
VOUT=90%, Duty cycle <35%
1.0
A
Output Voltage Load
Regulation
VLOADREG
0.5
%
Quiescent Current (Note 2)
Shutdown Current
IQ
ISHTDWN
VFB=0.5V or VOUT=90%
VEN=0V, VIN=4.2V
200
340
µA
0.1
1
µA
Oscillator Frequency
RDS(ON) of PMOS
RDS(ON) of NMOS
fosc
RPFET
RNFET
VFB=0.6V or VOUT=100%
VFB=0V or VOUT=0V
ISW=100mA
ISW=100mA
1.2
1.5
1.8
MHz
290
kHz
0.45
0.55
â¦
0.40
0.50
â¦
SW Leakage
Enable Threshold
Shutdown Threshold
ILSW
VEN
VEN=0V, VSW=0V or 5V,
VIN=5V
0.4
±1
µA
1.2
V
V
EN Leakage Current
IEN
±1
µA
Note 1: The Switch Current Limit is related to the Duty Cycle. Please refer to figure 15 for details.
Note 2: Dynamic quiescent current is higher due to the gate charge being delivered at the switching frequency.
Rev G â 12/02/2008
SP6669 1.5MHz 0.6A Sync. Step Down Converter © 2008 Exar Corporation
3/10
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese