MAX1639 Maxim, MAX1639 Datasheet - Page 2

• Manufacturer Part Number: MAX1639
• Description: High-Speed Step-Down Controller with Synchronous Rectification for CPU Power
• Manufacturer: Maxim

ABSOLUTE MAXIMUM RATINGS
V
PGND to AGND ..................................................................±0.3V
CSH, CSL to AGND ....................................-0.3V to (V
DL to PGND................................................-0.3V to (V
REF, CC1, CC2, FREQ, FB to AGND .........-0.3V to (V
BST to PGND..........................................................-0.3V to +12V
BST to LX..................................................................-0.3V to +6V
DH to LX.............................................(LX - 0.3V) to (BST + 0.3V)
ELECTRICAL CHARACTERISTICS
(V
High-Speed Step-Down Controller with
Synchronous Rectification for CPU Power
2
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.
DD
FB Voltage
Input Voltage Range
Input Undervoltage Lockout
V
V
Reference Voltage
Reference Load Regulation
Reference Undervoltage Lockout
Reference Short-Circuit Current
AC Load Regulation
DC Load Regulation
PWROK Trip Level
PWROK Output Voltage Low
PWROK Output Current High
Switching Frequency
Maximum Duty Cycle
FREQ Input Voltage
FREQ Input Voltage
DD
CC
DD
, V
_______________________________________________________________________________________
= V
Supply Current (I
Supply Current (I
CC
CC
, PWROK to AGND....................................-0.3V to +6V
PARAMETER
= +5V, PGND = AGND = 0V, FREQ = REF, T
CC
DD
)
)
Includes line and load
regulation errors
V
V
V
= 5.5V
V
regulation point, operating or standby mode
No load
0µA < I
Rising edge, 1% hysteresis
V
CSH - CSL = 0mV to 80mV
CSH - CSL = 0mV to 80mV
Rising FB, 1% hysteresis with respect to V
Falling FB, 1% hysteresis with respect to V
I
PWROK = 5.5V
FREQ = V
FREQ = REF
FREQ = AGND
FREQ = V
GND (low)
REF (mid)
V
SINK
CC
CC
CC
CC
REF
CC
= V
rising edge, 1% hysteresis
= V
= V
(high)
= 0V
= 2mA, V
REF
DD
DD
DD
CC
CC
< 100µA
= 5.5V, FB forced 60mV above
Operating
mode
Shutdown
mode
CC
DD
CC
CC
+ 0.3V)
+ 0.3V)
+ 0.3V)
= 4.5V
A
CONDITIONS
= 0°C to +85°C, unless otherwise noted.)
T
T
FB overdrive = 60mV
FB overdrive = 0V
V
A
A
REF
Continuous Power Dissipation (T
Operating Temperature Range
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
= +25°C to +85°C
= 0°C to +85°C
16-Pin Narrow SO (derate 8.70mW/°C above +70°C) ....696mW
SO
MAX1639ESE....................................................-40°C to +85°C
= 0V
JC
...........................................................................65°C/W
REF
REF
V
1.089
1.083
3.465
CC
MIN
-7.5
850
540
255
4.5
4.0
2.7
0.5
6.5
3.3
85
- 0.1
A
= +70°C)
1000
TYP
600
300
3.6
3.5
0.1
90
-6
5
1
8
1.111
1.117
3.535
MAX
1150
-4.5
660
345
5.5
4.2
2.5
0.1
3.0
4.0
9.5
0.4
0.2
3.7
10
10
1
UNITS
kHz
mA
mA
mV
mA
µA
%
%
%
%
V
V
V
V
V
V
V