MAX1927 Ver la hoja de datos (PDF) - Maxim Integrated
Número de pieza
componentes Descripción
Fabricante
MAX1927 Datasheet PDF : 12 Pages
| |||
Low-Output-Voltage, 800mA, PWM Step-Down
DC-DC Converters
ABSOLUTE MAXIMUM RATINGS
BATT, PWM, POK, COMP, SHDN to GND ...............-0.3V to +6V
PGND to GND .......................................................-0.3V to +0.3V
LX, REF, FB to GND ................................-0.3V to (VBATT + 0.3V)
Continuous Power Dissipation (TA = +70°C)
10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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.
ELECTRICAL CHARACTERISTICS
(VBATT = 3.6V, SHDN = BATT, CREF = 0.1µF, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
BATT Input Voltage
Undervoltage Lockout Threshold
Quiescent Current
Quiescent Current in Dropout
Shutdown Supply Current
REFERENCE AND ERROR AMP
FB Voltage Accuracy
FB Input Current
Transconductance (gm)
Reference Voltage Accuracy
Reference Supply Rejection
PWM CONTROLLER
P-Channel On-Resistance
N-Channel On-Resistance
Current-Sense Transresistance (RCS )
P-Channel Current-Limit Threshold
P-Channel Pulse-Skipping Current Threshold
N-Channel Negative Current-Limit Threshold
CONDITIONS
VBATT rising or falling (35mV hysteresis)
No load, pulse skipping, PWM = GND
1MHz switching
SHDN = GND
MAX1927R
MAX1928-15
MAX1928-18
MAX1928-25
MAX1928
MAX1927R
MAX1927R
MAX1928-15
MAX1928-18
MAX1928-25
2.6V < VBATT < 5.5V
VBATT = 3.6V
VBATT = 2.6V
VBATT = 3.6V
VBATT = 2.6V
MIN TYP MAX UNITS
2.6
5.5
V
2.15 2.35 2.55
V
140
240
µA
2
mA
190
340
µA
0.1
10
µA
0.738 0.75 0.762
1.477 1.5 1.523
V
1.773 1.8 1.827
2.462 2.5 2.538
5
10
15
µA
10
150
nA
250
210
µS
175
125
1.231 1.25 1.269
V
0.5
2
mV
0.25
0.4
Ω
0.3
0.5
0.17
0.3
Ω
0.2 0.35
0.48
V/A
1.1
1.3
1.6
A
0.11 0.13 0.15
A
-0.55
A
2 _______________________________________________________________________________________
Share Link: 