MAX1624-MAX1625 Просмотр технического описания (PDF) - Maxim Integrated
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MAX1624-MAX1625
Maxim Integrated
MAX1624-MAX1625 Datasheet PDF : 24 Pages
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High-Speed Step-Down Controllers with
Synchronous Rectification for CPU Power
ELECTRICAL CHARACTERISTICS
(VDD = VCC = D4 = +5V, PGND = AGND = D0–D3= 0V, RFREQ = 33.3kΩ, TA = -40°C to +85°C, unless otherwise noted.) (Note 4)
PARAMETER
Input Voltage Range
Input Undervoltage Lockout
VCC Supply Current
VDD Supply Current
CONDITIONS
VCC = VDD
VCC rising edge, 1% hysteresis
VCC = VDD = 5.5V,
Operating mode
FB overdrive = 200mV Standby mode
VCC = VDD = 5.5V, FB overdrive = 200mV,
operating or standby mode
MIN TYP MAX UNITS
4.5
5.5
V
3.9
4.3
V
3
mA
mA
0.4
0.2
mA
Reference Voltage
FB Accuracy
FB Set Voltage
PWROK Trip Level
Switching Frequency
Maximum Duty Cycle
DH On-Resistance
DL On-Resistance
Current-Limit Trip Voltage
No load
3.447 3.5 3.553
V
MAX1624, over line and load
±2.5
%
MAX1625
±2.5
%
Rising FB, 1% hysteresis with respect to VREF
-8
-6
-4
%
Falling FB, 1% hysteresis with respect to VREF
6
8
10
RFREQ = 20kΩ
800 1000 1200
RFREQ = 33.3kΩ
RFREQ = 200kΩ
510
600
690
kHz
80
100
120
RFREQ = 20kΩ
BST - LX = 4.5V
84
90
%
0.7
2
Ω
VDD = 4.5V
0.7
2
Ω
70
100
130
mV
Note 1: FB accuracy is 100% tested at FB = 3.5V (code 10000) with VCC = VDD = 4.5V to 5.5V and CSH - CSL = 0mV to 80mV. The
other DAC codes are tested at the major transition points with VCC = VDD = 5V and CSH - CSL = 0. FB accuracy at other
DAC codes over line and load is guaranteed by design.
Note 2: FB set voltage is 100% tested with VCC = VDD = 4.5V to 5.5V and CSH - CSL = 0mV to 80mV.
Note 3: AC load regulation sets the AC loop gain, to make tradeoffs between output filter capacitor size and transient response,
and has only a slight effect on DC accuracy or DC load-regulation error.
Note 4: Specifications from 0°C to -40°C are not production tested.
4 _______________________________________________________________________________________
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