Ata6264 [preliminary – Atmel ATA6264 User Manual
Page 37
37
4929B–AUTO–01/07
ATA6264 [Preliminary]
11.12
Output transistor switch-off
time
Time between reaching
0.1
×
(V
K30max
– V
VCOREmin
)
and
0.9
×
(V
K30max
– V
VCOREmin
)
or
0.1
×
(V
EVZmax
– V
VCOREmin
)
and
0.9
×
(V
EVZmax
– V
VCOREmin
)
SVCORE
t
SVCOREoff
150
ns
A
11.13
Overvoltage at pin VCORE
for switching off the regulator
and setting pin RESQ to low
(VCORE is set to 5V)
See numbers 14.6 and
14.6a of
11.13a
Overvoltage at pin VCORE
for switching off the regulator
and setting pin RESQ to low
(VCORE is set to 2.5V)
See numbers 14.7 and
14.7a of
11.13b
Overvoltage at pin VCORE
for switching off the regulator
and setting pin RESQ to low
(VCORE is set to 1.8V)
See numbers 14.8 and
14.8a of
11.14
Overvoltage switch-off time
Time between reaching
overvoltage and reaching
90% of V
SCORE
maximum
under on condition
SVORE
t
SVCOREoff
0
0.4
µs
A
11.15
Overcurrent switch-off time
Time between reaching
overcurrent and reaching
90% of V
SCORE
maximum
under on condition
SVCORE
t
SVCOREoff
0
0.5
µs
A
11.16
Leakage current at pin
SVCORE
Output transistor off
SVCORE
I
SVCORE
–10
10
µA
A
Error Amplifier
11.17
Maximum output current at
pin COMCOO sinking to low
COMCOO
I
COMCOO
200
3000
µA
A
11.18
Maximum output current at
pin COMCOO sourcing to
high
COMCOO
I
COMCOO
–165
–85
µA
A
11.19
Input impedance at pin
COMCOI
V
CORE
= 1.88V
V
CORE
= 2.5V/5V
COMCOI
R
COMCOI
7.5
13
18
27
k
Ω
k
Ω
A
11.20
Input offset voltage
–10
10
mV
D
11.21
DC open loop gain
70
dB
D
11.22
Unity-gain bandwidth
2
MHz
D
11.23
Output voltage low at pin
COMCOO
I
COMCOO
= 165 µA
COMSATO
V
COMSATO
0
0.3
V
A
11.24
Output voltage high at pin
COMCOO
I
COMCOO
= –85 µA
COMSATO
V
COMSATO
VINT –
0.6
VINT
V
A
Table 12-1.
Electrical Characteristics (Continued)– VCORE Power Supply
No.
Parameters
Test Conditions
Pin
Symbol
Min
Typ.
Max.
Unit
Type*
*) 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 have to be prevented.
2. The value of the minimum load current must be higher than the internal pull-up current at pin VCORE to ensure proper
function of the regulator.