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| MAX1624 Datasheet, PDF (2/24 Pages) Maxim Integrated Products – High-Speed Step-Down Controllers with Synchronous Rectification for CPU Power | |||
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High-Speed Step-Down Controllers with
Synchronous Rectification for CPU Power
ABSOLUTE MAXIMUM RATINGS
VDD, VCC, PWROK to AGND ......................................-0.3V to 6V
PGND to AGND ..................................................................±0.3V
CSH, CSL to AGND ....................................-0.3V to (VCC + 0.3V)
NDRV, PDRV, DL to PGND.........................-0.3V to (VDD + 0.3V)
REF, CC1, CC2, LG, D0âD4, FREQ,
FB to AGND................................................-0.3V to (VCC + 0.3V)
BST to PGND ............................................................-0.3V to 12V
BST to LX ....................................................................-0.3V to 6V
DH to LX.............................................(LX - 0.3V) to (BST + 0.3V)
Continuous Power Dissipation (TA = ±70°C)
24 Pin SSOP (derate 8.00mW/°C above +70°C) ..........640mW
16 Pin Narrow SO (derate 8.70mW/°C above 70°C).....696mW
Operating Temperature Range
MAX162_E_ _.......................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +125°C
Lead Temperature (soldering, 10sec) .............................+300°C
Stresses beyond those listed under âAbsolute Maximum Ratingsâ 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.
ELECTRICAL CHARACTERISTICS
(VDD = VCC = D4 = +5V, PGND = AGND = D0âD3 = 0V, RFREQ = 33.3kâ¦, TA = 0°C to +85°C, unless otherwise noted.)
PARAMETER
Input Voltage Range
Input Undervoltage Lockout
VCC Supply Current
CONDITIONS
VCC = VDD
VCC rising edge, 1% hysteresis
VCC = VDD = 5.5V,
Operating mode
FB overdrive = 200mV Standby mode
MIN TYP MAX
4.5
5.5
4.0
4.2
2.5
0.3
VDD Supply Current
VCC = VDD = 5.5V, FB overdrive = 200mV,
operating or standby mode
0.1
Reference Voltage
Reference Load Regulation
Reference Undervoltage Lockout
Reference Short-Circuit Current
FB Accuracy
FB Set Voltage
AC Load Regulation
(Note 3)
DC Load Regulation
(Note 3)
PWROK Trip Level
PWROK Output Voltage Low
PWROK Output Current High
Switching Frequency
No load
0µA < ILOAD < 100µA
Rising edge, 1% hysteresis
VREF = 0V
MAX1624, over line
and load (Note 1)
TA = +25°C to +85°C
TA = 0°C to +85°C
MAX1625, over line
and load (Note 2)
TA = +25°C to +85°C
TA = 0°C to +85°C
LG = GND
CSH - CSL =
0mV to 80mV
MAX1624 LG = REF
LG = VCC
MAX1625
LG = GND
CSH - CSL =
0mV to 80mV
MAX1624 LG = REF
LG = VCC
MAX1625
Rising FB, 1% hysteresis with respect to VREF
Falling FB, 1% hysteresis with respect to VREF
ISINK = 2mA, VCC = 4.5V
PWROK = 5.5V
RFREQ = 20kâ¦
RFREQ = 33.3kâ¦
RFREQ = 200kâ¦
3.465
2.7
0.5
-7.5
6.5
850
540
85
3.5
0.5
1
2
1
0.05
0.1
0.2
0.1
-6
8
1000
600
100
3.535
10
3.0
4.0
±1
±1.5
±1
±1.5
-4.5
9.5
0.4
1
1150
660
115
UNITS
V
V
mA
mA
V
mV
V
mA
%
%
%
%
%
V
µA
kHz
kHz
2 _______________________________________________________________________________________
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