MAX1927REUB Maxim Integrated Products, MAX1927REUB Datasheet - Page 3

• Manufacturer Part Number: MAX1927REUB
• Description: DC/DC Switching Converters 800mA PWM Step-Down DC/DC Converter
• Manufacturer: Maxim Integrated Products

ELECTRICAL CHARACTERISTICS (continued)
(V
ELECTRICAL CHARACTERISTICS
(V
N-Channel Synchronous Rectifier Turn-Off
Threshold
LX Leakage Current
Maximum Duty Cycle
Minimum Duty Cycle
Internal Oscillator Frequency
Thermal Shutdown Threshold
POK COMPARATOR
BATT Operating Voltage Range
Output Low Voltage
Output High Leakage Current
POK Threshold
Output Valid to POK Release Delay
LOGIC INPUTS (SHDN, PWM)
Logic Input High
Logic Input Low
Logic Input Current
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
BATT
BATT
Low-Output-Voltage, 800mA, PWM Step-Down
= 3.6V, SHDN = BATT, C
= 3.6V, SHDN = BATT, C
PARAMETER
PARAMETER
_______________________________________________________________________________________
REF
REF
= 0.1µF, T
= 0.1µF, T
A
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
= -40°C to +85°C, unless otherwise noted.)
V
PWM = GND
PWM = BATT
15°C hysteresis
I
V
V
MAX1927R
MAX1928-15
MAX1928-18
MAX1928-25
POK transitions to high impedance 20ms
after V
2.6V < V
2.6V < V
V
V
No load, pulse skipping, PWM = GND
SHDN = GND
MAX1927R
MAX1928-15
MAX1928-18
MAX1928-25
MAX1928
POK
BATT
FB
POK
BATT
BATT
= 0.5V, I
= 0.1 mA
= 5.5V
FB
= 5.5V, LX = GND or BATT
= 5.5V
rising or falling (35mV hysteresis)
BATT
BATT
> V
POK
POK
< 5.5 V
< 5.5 V
CONDITIONS
CONDITIONS
= 1mA
DC-DC Converters
0.650
1.305
1.566
2.175
0.732
1.764
0.85
2.15
1.47
2.45
MIN
MIN
100
-20
1.6
2.6
15
1
5
0.675
1.350
1.620
2.250
TYP
0.01
160
0.1
0.1
20
15
20
1
A
= +25°C.)
0.700
1.395
1.674
2.325
0.768
1.836
MAX
MAX
1.15
2.55
1.53
2.55
+20
240
340
5.5
0.1
0.6
5.5
25
10
15
0
1
1
D eg r ees
UNITS
UNITS
MHz
mA
ms
µA
µA
µA
µA
µA
µA
µA
%
%
V
V
V
V
V
V
V
V
3