MAX972 Maxim, MAX972 Datasheet - Page 13

• Manufacturer Part Number: MAX972
• Description: The MAX971–MAX974 and MAX981–MAX984 single/dual/quad low-voltage comparators feature the lowest power consumption available
• Manufacturer: Maxim

Figure 6. Battery Switchover Circuit
For the latest application details on UCSP contruction,
dimensions, tape carrier information, printed circuit
board
recommended reflow temperature profile as well as the
latest information on reliability testing results, go to
Maxim’s web site at www.maxim-ic.com/ucsp to find
the Application Note: UCSP–A Wafer-Level Chip-Scale
Package.
UCSP Applications Information
9V DC
R1
110k
R2
47k
WALL
ADAPTER
techniques,
(4 CELLS)
BATTERY
953k
470k
Q1
______________________________________________________________________________________
DC OK
1M
4 INB-
1 OUTA
3 INA+
bump-pad
STEP-DOWN
REGULATOR
MAX973
MAX983
7
V+
V-
2
Single/Dual-Supply Comparators
OUTB 8
HYST 5
REF 6
layout
Ultra-Low-Power, Open-Drain,
LOW BATT
SUPPLY
LOGIC
2.4M
10k
20k
3.3V
and
Figure 7. Level Shifter: ±5V Input to Single-Ended 3.3V Output
V
V
V
V
INC
IND
INA
INB
10k
10k
10k
10k
11
10
13
12
5
4
7
6
INA+
INC+
IND+
INB+
INC-
IND-
INA-
INB-
14
GND
3
5V
V+
MAX974
MAX984
-5V
9
V-
OUTC
OUTD
OUTA 2
OUTB
REF
1
16
15
8
3.3V
N.C.
13