SP6669_12 Datasheet, PDF (2/11 Pages) Exar Corporation – 600mA 1.5MHz Synchronous Step Down Converter

SP6 6 6 9
6 0 0 m A 1 .5 M H z Sy n ch r o n o u s St e p Do w n Co n v e r t e r
ABSOLUTE MAXIMUM RAT INGS
These are stress ratings only and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolut
e maximum
rating conditions for extended periods of time may affect
reliability.
Input Voltage VIN ................................
....... - 0.3V to 6.0V
Enable VFB Voltage ................................
....... - 0.3V to V IN
SW Voltage ................................
...... - 0.3V to ( VIN +0.3V)
PMOS Switch Source Current (DC) ........................ 800mA
NMOS Switch Sink Current ................................
.. 800mA
Peak Switch Sink/Source Current ............................
1.3A
Operating Junction Temperature ¹ .......................... 125 °C
Storage Temperature ..............................
- 65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................... 260°C
ESD Rating (HBM - Human Body Model) .................... 2kV
ESD Rating (MM - Machine Model) ........................... 200V
OPERATING RATINGS
Input Voltage Range V IN ...............................
Operating Temperature Range ...................
7KHUPDO5HVJLA .V....W...D....Q...F....H.......LJ......
7KHUPDO5HVJLc ..V....W...D....Q....F...H........LJ....
2.7V to 5.5V
- 40°C to 85 °C
..... 250 °C/W
....... 90 °C/W
Note 1: T J is a function of the ambient temperature T
power dissipation P D (T J= T A + P D x 250°C/W).
A and
ELECTRICAL SPECIFICA TIONS
Specifications with standard type are for an Operating Junction Temperature of T
J = 25°C only; limits applying over the full
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design, or statistical correlation. Typical values
represent the most likely parametric norm at T
A = 25°C, and are provided
for reference purposes only. Unless otherwise indicated, V
IN = 3.6 V.
Parameter
Min.
Typ.
Max.
Units
Conditions
Feedback Current I VFB
Regulated Feedback Voltage V FB 0.588
0.600
Reference Voltage Line
5HJXODWLFB RQÆ©9
2XWSXW9ROWDJHOU$T%FFXU- 3DF\Æ©9
Output Over - Voltage Lockout
Æ©9OVL
20
50
2.5
7.8
Output Voltage Line Regulation
Æ©9OUT
Peak Inductor Current I PK
1.0
Output Voltage Load Regulation
VLOADREG
Quiescent Current ² I Q
Shutdown Current I SHTDWN
Oscillator Frequency f OSC
RDS(ON) of PMOS R PFET
RDS(ON) of NMOS R NFET
SW Leakage I LSW
Enable Threshold V EN
Shutdown Threshold V EN
EN Leakage Current I EN
0.5
200
0.1
1.2
1.5
290
0.45
0.40
0.4
±30
0.612
0.4
+3
80
13
0.4
340
1
1.8
0.55
0.50
±1
1.2
±1
nA
V
%/V
%
mV
%
%/V
A
%
µA
µA
MHz
Hz
Æ»
Æ»
µA
V
V
µA
TA=25°C
‡ V_IN =2.5V to 5.5V
‡
Ʃ9OVL = V OVL ±VFB (Adj.)
Ʃ9OVL = V OVL ±VOUT (Fixed)
‡ V_IN =2.5V to 5.5V
VIN =3V, V FB=0.5V or V OUT=90%, Duty
cycle <35%
VFB=0.5V or VOUT=90%
VEN=0V, V IN =4.2V
‡ V_FB=0.6V or V _OUT=100%
‡ V_FB=0V or V _OUT=0V
I SW=100mA
I SW=100mA
VEN=0V, V SW=0V or 5V, V IN =5V
‡
‡
‡
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.
© 2012 Exar Corporation
2/ 11
Rev. 2. 2.0