MAX769 Просмотр технического описания (PDF) - Maxim Integrated
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MAX769 Datasheet PDF : 16 Pages
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2 or 3-Cell, Step-Up/Down,
Two-Way Pager System IC
ELECTRICAL CHARACTERISTICS (continued)
(OUT = 3.0V, BATT = 3.6V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
CONDITIONS
MIN TYP MAX
SERIAL-INTERFACE TIMING SPECIFICATIONS (Note 9)
SCL Maximum Clock Rate
50% duty cycle
5
SDI Setup Time (tDS)
100
SDI Hold Time (tDH)
50
SCL to SDO Output Valid (tDO)
CS to SDO Output Valid (tDV)
CS to SDO Disable (tTR)
CS to SCL Setup Time (tCSS)
CS to SCL Hold Time (tCSH)
CS Pulse Width High (tCSW)
70
70
70
50
50
100
SCL Pulse Width High or Low
(tCH, tCL)
50
DC-DC CONVERTER
Output Current, Run Mode
(Note 10)
Circuit of Figure 2, OUT = 3.0V, BATT = 3.0V
80
115
Output Current, Coast Mode
(Note 10)
Circuit of Figure 2, OUT = 3.0V, BATT = 3.0V
15
40
OUT Error, Coast Mode
(Note 11)
Coast Mode, OUT = 1.8V to 4.9V
-3.5
3.5
OUT Error, Run Mode (Note 12)
OUT DAC Step Size (Note 13)
OUT Load Regulation
OUT Line Regulation
Maximum LX Duty Cycle
OUT Voltage Ripple
LX Switch Current Limit
LX On-Resistance (Note 14)
PHASE-LOCKED LOOP (PLL)
Frequency, Free-Run
Frequency, Locked
Jitter (Note 15)
Capture Time (Note 15)
NICD CHARGER
Current High
Current Low
OUT Error, Backup Regulator
Backup-Regulator
On-Resistance (Note 16)
Run Mode, OUT = 1.8V to 4.9V
Coast or Run Mode, OUT = 1.8V to 4.9V
IOUT = 1mA to 80mA, Run Mode
BATT = 1.6V to 4.5V
OUT = 3.0V
IOUT = 80mA, COUT = 47µF with ESR < 0.25Ω
During the inductor charge cycle
LX1, LX2, BATT = 3.0V
NMOS
PMOS
TA = +25°C, FILT connected to REF
fSYNC = 38.4kHz
fSYNC = 38.4kHz, FILT Network = 1nF (22nF + 10kΩ)
fSYNC = 38.4kHz, FILT Network = 1nF (22nF + 10kΩ)
0.2V < (OUT - NICD) < 2V, 15mA_CHG = 1
0.2V < (OUT - NICD) < 2V, 1mA_CHG = 1
OUT = 2.8V, IOUT = 20mA, NICD = 3.3V
Backup Mode, NICD = 3.3V
-3.5
3.5
30
100
170
25
25
76
83
70
300
350
400
0.9
1.8
1.3
2.6
210
270
325
268.8
±15
1
25
7
25
0.45
1.5
-3.5
3.5
5
10
UNITS
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
mA
mA
%
%
mV
mV
mV
%
mVp-p
mA
Ω
kHz
kHz
kHz
ms
mA
mA
%
Ω
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