MAX669 MAXIM [Maxim Integrated Products], MAX669 Datasheet - Page 3

• Manufacturer Part Number: MAX669
• Description: 1.8V to 28V Input, PWM Step-Up Controllers in ?MAX
• Manufacturer: MAXIM [Maxim Integrated Products]

ELECTRICAL CHARACTERISTICS
ELECTRICAL CHARACTERISTICS (continued)
(V
(V
PWM Controller
Maximum Duty Cycle
Minimum EXT Pulse Width
Minimum SYNC Input-Pulse Duty Cycle
Minimum SYNC Input Low Pulse Width
SYNC Input Rise/Fall Time
SYNC Input Frequency Range
SYNC/SHDN Falling Edge to Shutdown Delay
SYNC/SHDN Input High Voltage
SYNC/SHDN Input Low Voltage
SYNC/SHDN Input Current
EXT Sink/Source Current
EXT On-Resistance
Input Voltage Range, V
Input Voltage Range with V
FB Threshold
FB Input Current
Current-Limit Threshold
Idle Mode Current-Sense Threshold
CS+ Input Current
V
Shutdown Supply Current (V
Reference and LDO Regulators
LDO Output Voltage
LDO Undervoltage Lockout Threshold
PWM CONTROLLER
REFERENCE AND LDO REGULATORS
CC
CC
CC
= LDO = +5V, R
= LDO = +5V, R
Supply Current (Note 1)
PARAMETER
PARAMETER
_______________________________________________________________________________________
OSC
OSC
CC
= 200kΩ, T
= 200kΩ, T
CC
CC
Tied to LDO
)
A
A
= -40°C to +85°C, unless otherwise noted.) (Note 2)
= 0°C to +85°C, unless otherwise noted. Typical values are at T
1.8V to 28V Input, PWM Step-Up
R
R
R
Not tested
3.0V < V
1.8V < V
3.0V < V
1.8V < V
SYNC/SHDN = 5V
SYNC/SHDN = 28V
EXT forced to 2V
EXT high or low
MAX668
MAX669
CS+ forced to GND
V
SYNC/SHDN = GND, V
LDO load =
∞ to 400Ω
Sensed at LDO, falling edge,
hysteresis = 1%, MAX669 only
V
FB
OSC
OSC
OSC
FB
= 1.30V, V
= 1.30V
= 200kΩ ±1%
= 100kΩ ±1%
= 500kΩ ±1%
CC
CC
CC
CC
< 28V
< 3.0V (MAX669)
< 28V
< 3.0V (MAX669)
CONDITIONS
CONDITIONS
CC
5V ≤ V
(includes LDO dropout)
3V ≤ V
(includes LDO dropout)
= 3V to 28V
CC
CC
CC
Controllers in µMAX
≤ 28V
≤ 28V
= 28V
MIN
100
2.0
1.5
87
86
86
1.22
4.50
2.65
2.40
MIN
1.8
2.7
85
3
3
A
= +25°C.)
TYP
290
0.5
1.5
90
90
90
20
50
70
1
2
MAX
1.28
5.50
5.50
2.60
115
350
5.5
MAX
28
28
20
27
0.45
0.30
200
200
500
1
6
3.0
6.5
93
94
94
45
5
UNITS
UNITS
mV
mV
kHz
nA
µA
µA
µA
ns
ns
µs
%
%
µA
ns
Ω
V
V
V
V
V
V
V
V
A
3