MAX767 Maxim, MAX767 Datasheet - Page 2

• Manufacturer Part Number: MAX767
• Description: 5V-to-3.3V / Synchronous / Step-Down Power-Supply Controller
• Manufacturer: Maxim

ABSOLUTE MAXIMUM RATINGS
V
PGND to GND ........................................................................±2V
BST to GND ...............................................................-0.3V, +15V
LX to BST.....................................................................-7V, +0.3V
Inputs/Outputs to GND
DL to PGND .....................................................-0.3V, V
DH to LX...........................................................-0.3V, BST + 0.3V
5V-to-3.3V, Synchronous, Step-Down
Power-Supply Controller
ELECTRICAL CHARACTERISTICS
(V
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
2
CC
V
Output Voltage (FB)
Load Regulation
Line Regulation
V
Current-Limit Voltage
SS Source Current
SS Fault Sink Current
Reference Voltage (REF)
V
V
Oscillator Frequency
Oscillator SYNC Range
SYNC High Pulse Width
SYNC Low Pulse Width
SYNC Rise/Fall Time
Oscillator Maximum Duty Cycle
Input Low Voltage
Input High Voltage
Input Current
DL Sink/Source Current
DH Sink/Source Current
DL On Resistance
DH On Resistance
CC
(ON, REF, SYNC, CS, FB, SS) .....................-0.3V, V
CC
CC
CC
CC
_______________________________________________________________________________________
to GND .................................................................-0.3V, +7V
= ON = 5V, GND = PGND = SYNC = 0V, I
Input Supply Range
Fault Lockout Voltage
Standby Current
Quiescent Current
PARAMETER
0mV < (CS - FB) < 80mV,
4.5V < V
(includes load and
line regulation)
(CS - FB) = 0mV to 80mV
V
Falling edge, hysteresis = 1%
CS - FB
MAX767, MAX767R, MAX767S
MAX767T
ON = 0V, V
FB = CS = 3.5V
SYNC = 3.3V
SYNC = 0V or 5V
Not tested
SYNC = 3.3V
SYNC = 0V
SYNC, ON
ON
SYNC
SYNC, ON = 0V or 5V
DL = 2V
(BST - LX) = 4.5V, DH = 2V
High or low
High or low, (BST - LX) = 4.5V
CC
= 4.5V to 5.5V
CC
REF
< 5.5V
CC
= 0mA, T
= 5.5V
CC
CC
+ 0.3V
+ 0.3V
CONDITIONS
A
= T
MAX767, MAX767T
MAX767R
MAX767S
MIN
to T
REF Short to GND.......................................................Momentary
REF Current.........................................................................20mA
Continuous Power Dissipation (T
Operating Temperature Ranges:
Lead Temperature (soldering, 10sec) .............................+300°C
20-Pin SSOP (derate 8.00mW/°C above +70°C) ..........640mW
MAX767CAP/MAX767_CAP.................................0°C to +70°C
MAX767EAP/MAX767_EAP ..............................-40°C to +85°C
MAX
, unless otherwise noted. Typical values are at T
V
CC
3.17
3.32
3.46
3.80
2.50
3.24
3.26
2.40
MIN
260
240
200
200
4.5
80
89
2
- 0.5
A
= +70°C)
TYP
3.35
3.50
3.65
3.30
3.30
100
120
300
200
2.5
0.1
0.7
92
95
4
1
1
MAX
3.46
3.60
3.75
4.20
3.36
3.34
120
200
340
350
200
5.5
6.5
1.0
0.8
±1
7
7
A
= +25°C.)
UNITS
kHz
kHz
mA
mA
mV
µA
µA
µA
ns
ns
ns
%
%
%
Ω
Ω
V
V
V
V
V
V
A
A