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MAX669 Datasheet(PDF) 3 Page - Maxim Integrated Products

Part # MAX669
Description  1.8V to 28V Input, PWM Step-Up Controllers in 關MAX
PDF  18 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX669 Datasheet(HTML) 3 Page - Maxim Integrated Products

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V
1.8V to 28V Input, PWM Step-Up
Controllers in µMAX
_______________________________________________________________________________________
3
70
100
500
SYNC Input Frequency Range
SYNC/SHDN Falling Edge to Shutdown Delay
2
5
EXT high or low
EXT On-Resistance
1
EXT forced to 2V
Ω
EXT Sink/Source Current
1.5
1.8V < VCC < 3.0V (MAX669)
A
SYNC/SHDN Input High Voltage
0.30
1.8V < VCC < 3.0V (MAX669)
µA
SYNC/SHDN Input Low Voltage
0.5
3.0
SYNC/SHDN = 5V
SYNC/SHDN Input Current
1.5
6.5
SYNC/SHDN = 28V
V
MIN
TYP
MAX
CONDITIONS
PARAMETER
µs
kHz
UNITS
ELECTRICAL CHARACTERISTICS (continued)
(VCC = LDO = +5V, ROSC = 200kΩ, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
ELECTRICAL CHARACTERISTICS
(VCC = LDO = +5V, ROSC = 200kΩ, TA = -40°C to +85°C, unless otherwise noted.) (Note 2)
2.40
2.60
Sensed at LDO, falling edge,
hysteresis = 1%, MAX669 only
LDO Undervoltage Lockout Threshold
2.65
5.50
3V
≤ VCC ≤ 28V
(includes LDO dropout)
4.50
5.50
5V
≤ VCC ≤ 28V
(includes LDO dropout)
LDO Output Voltage
Reference and LDO Regulators
V
328
MAX668
V
PWM Controller
Input Voltage Range, VCC
6
SYNC/SHDN = GND, VCC = 28V
Shutdown Supply Current (VCC)
350
VFB = 1.30V, VCC = 3V to 28V
µA
VCC Supply Current (Note 1)
1
CS+ forced to GND
µA
CS+ Input Current
327
µA
Idle Mode Current-Sense Threshold
2.7
5.5
mV
Input Voltage Range with VCC Tied to LDO
1.22
1.28
mV
FB Threshold
20
VFB = 1.30V
nA
FB Input Current
85
115
V
Current-Limit Threshold
MIN
MAX
CONDITIONS
V
PARAMETER
V
UNITS
86
90
94
ROSC = 500kΩ ±1%
MAX669
LDO load =
∞ to 400Ω
1.8
28
3.0V < VCC < 28V
3.0V < VCC < 28V
2.0
0.45
V
200
Not tested
SYNC Input Rise/Fall Time
ns
50
200
Minimum SYNC Input Low Pulse Width
ns
20
45
Minimum SYNC Input-Pulse Duty Cycle
%
290
Minimum EXT Pulse Width
ns
87
90
93
ROSC = 200kΩ ±1%
86
90
94
ROSC = 100kΩ ±1%
Maximum Duty Cycle
%
PWM CONTROLLER
REFERENCE AND LDO REGULATORS



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