MAX1927REUB Maxim Integrated Products, MAX1927REUB Datasheet - Page 4

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

Low-Output-Voltage, 800mA, PWM Step-Down
DC-DC Converters
ELECTRICAL CHARACTERISTICS (continued)
(V
4
FB Input Current
Reference Voltage Accuracy
Reference-Supply Rejection
PWM CONTROLLER
P-Channel On-Resistance
N-Channel On-Resistance
P-Channel Current-Limit Threshold
P-Channel Pulse-Skipping Current Threshold
LX Leakage Current
Maximum Duty Cycle
Minimum Duty Cycle
Internal Oscillator Frequency
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
_______________________________________________________________________________________
= 3.6V, SHDN = BATT, C
PARAMETER
REF
= 0.1µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
MAX1927R
2.6V < V
V
V
V
V
V
PWM = GND
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
POK
BATT
BATT
BATT
BATT
BATT
FB
POK
BATT
= 0.5V, I
= 0.1 mA
= 5.5V
FB
= 3.6V
= 2.6V
= 3.6V
= 2.6V
= 5.5V, LX = GND or BATT
= 5.5V
BATT
BATT
BATT
> V
POK
POK
< 5.5V
< 5.5 V
< 5.5 V
CONDITIONS
= 1mA
0.650
1.305
1.566
2.175
MIN
1.22
0.10
100
-20
1.1
0.8
1.6
15
1
0.10
A
1.269
0.700
1.395
1.674
2.325
= +25°C.)
MAX
0.30
0.35
0.16
+20
150
0.4
0.5
1.6
1.2
5.5
0.1
0.6
25
2
0
1
1
UNITS
MHz
mV
ms
nA
µA
µA
µA
%
%
V
A
A
V
V
V
V
V