S-1701A2728-M5T1G SII [Seiko Instruments Inc], S-1701A2728-M5T1G Datasheet - Page 42
![no-image](/images/no-image-200.jpg)
S-1701A2728-M5T1G
Manufacturer Part Number
S-1701A2728-M5T1G
Description
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR WITH RESET FUNCTION
Manufacturer
SII [Seiko Instruments Inc]
Datasheet
1.S-1701A2728-M5T1G.pdf
(70 pages)
- Current page: 42 of 70
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Detector block
42
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR WITH RESET FUNCTION
S-1701 Series
1. Basic operation
Figure 36 shows a block diagram of the detector block.
(1) When the SENSE voltage (V
(2) When V
(3) When V
(4) V
(5) In the S-1701 Series, the detection voltage can be set within the range of 1.5 to 5.5 V
transistor is OFF and V
voltage (−V
output. At this time, the Nch transistor N1 in Figure 36
the comparator input voltage is
becomes ON, and the comparator input voltage is changed to
case the output becomes V
even when V
When V
VDOUT pin is delayed for t
(operating voltage range: 0.8 to 6.5 V).
SS
Current
supply
*1. Parasitic diode
is output when V
SENSE
SENSE
IN
falls below the minimum operating voltage, the output becomes undefined. In this
DET
SENSE
rises above +V
goes below +V
). When the V
V
V
V
IN
ref
surpasses −V
SS
IN
Figure 36 Block Diagram (Detector Block)
IN
rises above the minimum operating voltage. The V
R
R
V
R
(high) is output. Since the Nch transistor N1 in Figure 36 is OFF,
SENSE
a
b
c
+
−
D
IN
Seiko Instruments Inc.
due to the delay circuit.
SENSE
DET
DET
because it is pulled up.
SENSE
, the Nch transistor becomes OFF and V
(R
, V
DET
N1
b
falls below −V
R
IN
+ R
, as long as it does not exceed the release voltage +V
a
) is higher than the release voltage (+V
is output, as long as V
+ R
c
) • V
Delay circuit
b
+ R
SENSE
c
DET
.
, the Nch transistor becomes ON and V
Nch
SENSE
R
b
R
• V
remains above the detection
a
+ R
SENSE
*1
b
IN
.
SS
is output. V
level still appears
VDOUT
DET
Rev.2.4
), the Nch
IN
at the
_00
SS
DET
is
.
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