LTC2930 Linear Technology, LTC2930 Datasheet - Page 6

• Manufacturer Part Number: LTC2930
• Description: Confi gurable Six Supply Monitor
• Manufacturer: Linear Technology

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PIN FUNCTIONS
LTC2930
MR (Pin 6): Manual Reset Input. A logic low on this
pin pulls RST low. When the MR pin returns high, RST
returns high after the confi gured reset timeout if all six
voltage inputs are above threshold. A weak internal pull-up
allows the pin to be left open for normal monitor operation.
When using a switch, the switch is debounced through
the reset circuitry using the delay provided by the C
timing capacitor.
GND (Pin 7): Ground.
VPG (Pin 8): Threshold Select Input. Connect to an external
1% resistive divider between VREF and GND to select 1
of 16 combinations and/or ±adjustable voltage thresholds
(See Table 1). Do not add capacitance on the VPG pin.
VREF (Pin 9): Buffered Reference Voltage Output. A
1.210V nominal reference used for the mode selection
voltage (V
6
BLOCK DIAGRAM
PG
) and for the offset of negative adjustable
VREF
GND
VPG
V1
V2
11
V3
V4
10
V5
V6
12
9
8
3
2
1
7
1.210V
RESISTIVE
DIVIDER
MATRIX
A/D
0.5V
4
4
BUFFER
V
–
+
–
+
+
–
CC
CMP1-4
CMP5
CMP6
REFERENCE
BANDGAP
10μA
RT
6 MR
applications. The buffered reference can source and sink
up to 1mA. The reference can drive a bypass capacitor of
up to 1000pF without oscillation.
V4 (Pin 10): Voltage Input 4. Select from 1.8V, 1.5V, ADJ
or –ADJ. See Applications Information for details. Tie to
V1 if unused.
V2 (Pin 11): Voltage Input 2. Select from 3.3V, 3V or 2.5V.
See Applications Information for details. The greater of V1,
V2 is also V
with a 0.1μF (or greater) capacitor. RST is weakly pulled
up to V2.
V6 (Pin 12): Adjustable Voltage Input 6. High impedance
comparator input with 0.5V typical threshold. See
Applications Information for details. Tie to V1 if unused.
Exposed Pad (Pin 13): Exposed pad may be left open or
connected to device ground.
4
22μA
CC
RESET PULSE
ADJUSTABLE
GENERATOR
POWER
DETECT
for the device. Bypass this pin to ground
V1
V2
4 CRT
C
V
RT
CC
V
CC
2μA
2931 BD
V2
6μA
RST
5
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