MAX668EUB Maxim Integrated Products, MAX668EUB Datasheet - Page 2

• Manufacturer Part Number: MAX668EUB
• Description: IC PWM BST FLYBCK ISO CM 10UMAX
• Manufacturer: Maxim Integrated Products

Specifications of MAX668EUB

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 575kHz
• Duty Cycle: 94%
• Voltage - Supply: 3 V ~ 28 V
• Buck: No
• Boost: Yes
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Frequency-max: 575kHz
• Duty Cycle (max): 94 %
• Output Voltage: 28 V
• Output Current: 1000 mA
• Mounting Style: SMD/SMT
• Switching Frequency: 100 KHz to 500 KHz
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Synchronous Pin: Yes
• Topology: Boost, Flyback
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: Q1513668

ELECTRICAL CHARACTERISTICS
(V
ABSOLUTE MAXIMUM RATINGS
1.8V to 28V Input, PWM Step-Up
Controllers in µMAX
2
V
PGND to GND....................................................................±0.3V
SYNC/SHDN to GND .............................................-0.3V to +30V
EXT, REF to GND.....................................-0.3V to (V
LDO, FREQ, FB, CS+ to GND ................................ -0.3V to +6V
LDO Output Current...........................................-1mA to +20mA
REF Output Current..............................................-1mA to +1mA
LDO Short Circuit to GND .........................................Momentary
REF Short Circuit to GND ..........................................Continuous
PWM Controller
REFERENCE AND LDO REGULATORS
OSCILLATOR
PWM CONTROLLER
Input Voltage Range, V
Input Voltage Range with V
FB Threshold
FB Threshold Load Regulation
FB Threshold Line Regulation
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
Undervoltage Lockout Threshold
REF Output Voltage
REF Load Regulation
REF Undervoltage Lockout Threshold
Oscillator
Oscillator Frequency
CC
CC
CC
_______________________________________________________________________________________
to GND ..........................................................-0.3V to +30V
= LDO = 5V, R
Supply Current (Note 1)
PARAMETER
OSC
CC
= 200kΩ, T
CC
CC
Tied to LDO
)
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
LDO
MAX668
MAX669
Typically 0.013% per mV on CS+;
V
load current.
Typically 0.012% per % duty factor on
EXT; EXT duty factor for a step-up is:
100% (1 – V
V
CS+ forced to GND
V
SYNC/SHDN = GND, V
LDO load =
∞ to 400Ω
Sensed at LDO, falling edge,
hysteresis = 1%, MAX668 only
No load, C
REF load = 0 to 50µA
Rising edge, 1% hysteresis
R
R
R
CS
FB
FB
OSC
OSC
OSC
+ 0.3V)
+ range is 0 to 100mV for 0 to full
= 1.30V
= 1.30V, V
= 200kΩ ±1%
= 100kΩ ±1%
= 500kΩ ±1%
REF
IN
CONDITIONS
/V
CC
= 0.22µF
OUT
5V ≤ V
(includes LDO dropout)
3V ≤ V
(includes LDO dropout)
Continuous Power Dissipation (T
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering,10sec) ..............................+300°C
= 3V to 28V
)
10-Pin µMAX (derate 5.6mW/°C above +70°C) ..........444mW
CC
CC
CC
≤ 28V
≤ 28V
= 28V
1.225
1.225
4.50
2.65
2.40
MIN
225
425
1.8
2.7
1.0
85
85
3
5
A
A
= +25°C.)
= +70°C)
1.250
0.013
0.012
1.250
TYP
5.00
2.50
100
220
250
500
100
0.2
3.5
1.1
15
-2
1
1.275
1.275
MAX
28.0
5.50
5.50
2.60
115
350
275
575
115
5.5
-10
1.2
28
20
25
1
6
UNITS
%/mV
%/%
kHz
mV
mV
nA
µA
µA
µA
mV
V
V
V
V
V
V
V