MAX1540 查看數據表（PDF） - Maxim Integrated
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产品描述 (功能)
生产厂家
MAX1540
Maxim Integrated
MAX1540 Datasheet PDF : 49 Pages
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Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 15V, VCC = VDD = ON1 = ON2 = 5V, SKIP = GND, LDOIN (MAX1541) = V+, TA = -40°C to +85°C, unless otherwise noted.)
(Note 4)
PARAMETER
Shutdown Supply Current (VCC)
Shutdown Supply Current
(VDD, MAX1541 Only)
SYMBOL
Shutdown Supply Current (V+)
Shutdown Supply Current
(LDOIN, MAX1541 Only)
PWM CONTROLLERS
MAX1540 Main Output-Voltage
Accuracy (OUT1) (Note 2)
MAX1540 Secondary Output-
Voltage Accuracy (OUT2)
(Note 2)
MAX1541 Main Feedback
Voltage Accuracy (FB1)
MAX1541 Secondary Output-
Voltage Accuracy (OUT2)
(Note 2)
VOUT1
VFB1
VOUT2
VFB2
VFB1
VOUT2
VFB2
DH1 On-Time (Note 3)
tON1
DH2 On-Time (Note 3)
tON2
On-Time Tracking
Minimum Off-Time
tOFF(MIN)
LINEAR REGULATOR (LDO) (Note 1)
MAX1540 LDO Output-Voltage
Accuracy
VLDOOUT
CONDITIONS
ON1 = ON2 = LDOON = GND
ON1 = ON2 = LDOON = GND
MAX1540: ON1 = ON2 = LDOON = GND,
V+ = 28V, VCC = 0 or 5V
MAX1541: ON1 = ON2 = LDOON = GND,
V+ = 28V, VCC = VDD = 0 or 5V
LDOON = GND
Preset output,
V+ = 5.5V to 28V,
SKIP = VCC
FB1 = GND
FB1 = VCC
Adjustable output, V+ = 5.5V to 28V,
SKIP = VCC
Preset output,
V+ = 5.5V to 28V,
SKIP = VCC
FB2 = GND
FB2 = VCC
Adjustable output, V+ = 5.5V to 28V,
SKIP = VCC
V+ = 4.5V to 28V,
SKIP = VCC
REFIN1 = 0.35 x REF
REFIN1 = REF
Preset output,
V+ = 4.5V to 28V,
SKIP = VCC
FB2 = GND
FB2 = VCC
Adjustable output, V+ = 4.5V to 28V,
SKIP = VCC
TON = GND (620kHz)
V+ = 15V,
VOUT1 = 1.5V
TON = REF (485kHz)
TON = open (345kHz)
TON = VCC (235kHz)
TON = GND (460kHz)
V+ = 15V,
VOUT2 = 1.5V
TON = REF (355kHz)
TON = open (255kHz)
TON = VCC (170kHz)
tON2 with respect to tON1 (Note 3)
(Note 3)
ON1 = ON2 = GND, 0 < ILDOOUT < 10mA
V+ = 6V to 28V
0 < ILDOOUT < 100mA
MIN
1.773
1.182
0.689
2.462
1.477
0.689
0.689
1.97
2.462
1.773
0.689
149
191
274
402
201
260
371
556
118
4.85
4.65
MAX
5
5
UNITS
µA
µA
15
µA
5
10
µA
1.827
1.218
V
0.711
2.538
1.523
V
0.711
0.711
V
2.03
2.538
1.827
V
0.711
190
242
ns
335
491
256
331
ns
453
679
152
%
500
ns
5.10
V
5.10
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