MAX769
2 or 3-Cell, Step-Up/Down,
Two-Way Pager System IC
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(OUT = 3.0V, BATT = 3.6V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
BATT, OUT, NICD, LBO, RSO to AGND...................-0.3V to +6V
REG1, REG2, OFS, REF, R2IN to AGND .....-0.3V to (OUT + 0.3V)
SCL, SDO, SDI,
CS, SYNC, FILT, DR2IN,
CH0, LBI, RSIN to AGND......................-0.3V to (REG1 + 0.3V)
REG3 .......................................................-0.3V to (REG2 + 0.3V)
DR1, DR2 to DRGND ...............................-0.3V to (BATT + 0.3V)
PGND, DRGND to AGND......................................-0.3V to +0.3V
LX1 to PGND .............................................-0.3V to (OUT + 0.3V)
LX2 to PGND............................................-0.3V to (BATT + 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
QSOP (derate 8mW/°C above +70°C)..........................640mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +165°C
Lead Temperature (soldering, 10sec).............................+300°C
I
REF
= 0 to 20µA, OUT = 1.8V to 4.9V V-1.5% 1.28 1.5%
T
A
= +25°C
Reference Voltage
I
DR
= 120mA
Run or Coast Mode
Ω
1.8 2.8
DR1, DR2 On-Resistance
V
DR
= 5V nA1 250DR1, DR2 Leakage Current
Charger and Backup Modes off, NICD = 3.6V µA
Incremental supply current when on
REG2, REG3 and CH DAC off, V
OUT
= 2.8V
REG2, REG3 and CH DAC on
Coast Mode
1.2 3
Incremental supply current when on
T
A
= +25°C
CONDITIONS
T
A
= -40°C to +85°C
I
SDO
= 100µA mV200SDO Output Low
I
SDO
= -100µA, from REG1 V
V
REG1
- 0.2
SDO Output High
Includes CS, SDI, SCL, DR2IN, and SYNC
V0.4Logic Input Level Low
Includes CS, SDI, SCL, DR2IN, and SYNC
V
V
REG1
- 0.4
Logic Input Level High
3.6
Charger and Backup Modes off, BATT = 0V,
OUT = 0V
µA1.2 3
NICD Input Current, Power Fail
(Note 8)
Logic Input = 0 to 3.3V; includes CS, SDI, SCL,
DR2IN, and SYNC
µA
V1.6 2.0
-1 1
BATT Minimum Start-Up Voltage
(Note 3)
V1.5 5.5
Logic Input Current
NICD Input Current, Standby
(Note 6)
BATT Typical Operating Range
(Note 2)
Incremental supply current when on µA
Backup Mode, NICD = 3.6V, OUT = 3V
50REG2 Supply Current (Note 4)
µA20 40
NICD Input Supply Current, Backup
(Note 7)
µA30CH DAC Supply Current (Note 4)
µA13 25Coast Mode Supply Current (Note 4)
µA875 1350Run Mode Supply Current (Note 4)
µA4 10BATT Supply Current (Note 5)
µA20REG3 Supply Current (Note 4)
UNITSMIN TYP MAXPARAMETER
GENERAL PERFORMANCE
