Ata6264 [preliminary – Atmel ATA6264 User Manual
Page 31
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4929B–AUTO–01/07
ATA6264 [Preliminary]
Necessary for operation:
V
EVZ
= 5.5V to 40V, V
CP
> V
EVZ
+ 7V, V
INT
= 3.7V to 5.45V
Operating conditions of all other supply pins:
V
K30
, V
PERI
and V
CORE
are within functional range limits, T
j
= –40°C to +150°C
Other pins:
As defined in
Section 4. ”Functional Range” on page 8
Table 10-1.
Electrical Characteristics – VSAT Power Supply
No. Parameters
Test Conditions
Pin
Symbol
Min
Typ.
Max.
Unit
Type*
9.1
V
EVZ
voltage for the buck
converter to start running
EVZ
V
EVZ
7.5
9
V
A
9.2
V
EVZ
voltage for the buck
converter to stop
EVZ
V
EVZ
5.5
6.2
V
A
9.3
Regulator switch-on time via pin
EVZ
SVSAT
t
SVSAT
0
20
µs
A
9.4
Regulator switch-off time via pin
EVZ
SVSAT
t
SVSAT
0
5
µs
A
9.5
Regulator switching frequency
V
EVZ
≥
8V
SVSAT
f
SVSAT
–5%
200
+5%
kHz
A
9.5a Regulator switching frequency
5.5V > V
EVZ
≥
8V
SVSAT
f
SVSAT
–10%
200
+10%
kHz
A
9.6
Output current limit
SVSAT
I
SVSAT
0.8
1
A
A
9.7
R
Dson
of output transistor
SVSAT
R
SVSAT
1
Ω
A
9.8
Output voltage #1 only at
V
PERI
= 3.3V
Band-gap tolerance
included
VSAT
V
VSAT1
–4%
7.8
+4%
V
A
9.9
Output voltage #2
V
VSAT2
programmed,
Band-gap tolerance
included
VSAT
V
VSAT2
–4%
9.1
+4%
V
A
9.10 Output voltage #3
V
VSAT3
programmed,
Band-gap tolerance
included
VSAT
V
VSAT3
–4%
10.4
+4%
V
A
9.11 Output transistor switch-on time
Time between reaching
0.1
×
(V
EVZmax
– V
SVSATmin
)
and
0.9
×
(V
EVZmax
– V
SVSATmin
)
150
ns
A
9.12 Output transistor switch-on time
Time between reaching
0.9
×
(V
EVZmax
– V
SVSATmin
)
and
0.1
×
(V
EVZmax
– V
SVSATmin
)
150
ns
A
9.13
Overvoltage switching off the
regulator
VSAT
V
VSAT
1.1
×
V
SATX
V
A
9.14 Overvoltage switch-on time
Time between reaching
overvoltage and reaching
90% of V
SVSAT
maximum
under on condition
SVSAT
t
SVSAToff
0
0.4
µs
A
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Notes:
1. Depending on implementation of slope compensation; sub-harmonics must be prevented
2. The value of the minimum load current must be higher than the internal pull-up current at pin VSAT to ensure proper func-
tion of the regulator