MAX1572 Datasheet, PDF (3/11 Pages) Maxim Integrated Products – 800mA, 2MHz, PWM DC-to-DC Step-Down Converter with RESET

800mA, 2MHz, PWM DC-to-DC
Step-Down Converter with RESET
ELECTRICAL CHARACTERISTICS (continued)
(V_BATT = 3.6V, T_A = +0°C to +85°C, unless otherwise noted. Typical values are at T_A = +25°C.)
PARAMETER
CONDITIONS
MIN
SS Discharge Resistance
EN1 = EN2 = GND
EN_ Logic Input High
V_ABATT > 4.2V
1.6
V_ABATT ≤ 4.2V
1.4
EN_ Logic Input Low
EN_ Logic Input Current
RESET Threshold
Percent of nominal, measured at OUT
87
RESET Timer Delay Time
From V_OUT > 90% to RESET = HI
170
RESET Output Low Level
I_SINK = 1mA
RESET Internal Pullup Resistance to OUT
9
Thermal-Shutdown Threshold
Thermal-Shutdown Hysteresis
T_J rising
TYP
100
0.1
90
200
0.015
14
160
20
MAX
200
UNITS
Ω
V
0.4
V
1
µA
93
%
230
ms
0.075
V
20
kΩ
°C
°C
ELECTRICAL CHARACTERISTICS
(V_BATT = 3.6V, T_A = -40°C to +85°C, unless otherwise noted.) (Note 3)
PARAMETER
BATT Input Voltage
Undervoltage Lockout Threshold
Quiescent Supply Current
Shutdown Supply Current
Maximum Output Current
OUT Bias Current
Output-Voltage Accuracy
(Voltage Positioning)
P-Channel On-Resistance
N-Channel On-Resistance
N-Channel Current-Limit Threshold
N-Channel Zero-Crossing Threshold
LX Output Current
LX Leakage Current
Maximum Duty Cycle
Minimum Duty Cycle
Switching Frequency
SS Output Impedance
SS Discharge Resistance
EN_ Logic Input High
CONDITIONS
V_BATT rising and falling, 1% hysteresis
EN1 = GND, EN2 = BATT, no switching
EN1 = EN2 = GND
No load, EN1 = EN2 = BATT
100mA load
I_LX = 180mA
I_LX = 180mA
EN1 = EN2 = BATT
EN1 = BATT, EN2 = GND
(Note 2)
EN1 = EN2 = GND
EN1 = EN2 = BATT
EN1 = EN2 = GND
V_ABATT > 4.2V
V_ABATT ≤ 4.2V
MIN
TYP
MAX UNITS
2.6
5.5
V
2.20
2.55
V
80
µA
3
µA
800
mA
9
µA
3.2
%
-1.2
+2.8
0.45
Ω
0.3
Ω
-0.68
-0.22
A
10
65
mA
1.4
A_RMS
10
µA
100
%
17.3
%
1.8
2.2
MHz
65
150
kΩ
200
Ω
1.6
V
1.4
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