MAX1540A Datasheet, PDF (3/49 Pages) Maxim Integrated Products – Dual Step-Down Controllers with Saturation Protection, Dynamic Output, and Linear Regulator

Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 15V, V_CC = V_DD = ON1 = ON2 = 5V, SKIP = GND, LDOIN (MAX1541) = V+, T_A = 0°C to +85°C, unless otherwise noted. Typical
values are at T_A = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Standby Supply Current
(V_DD, MAX1541 Only)
ON1 = ON2 = GND, V_LDOON = V+ = 28V
<1
5
µA
Standby Supply Current (V+)
MAX1540A: ON1 = ON2 = GND,
LDOON = V+ = 28V, V_CC = 0 or 5V
MAX1541: ON1 = ON2 = GND,
LDOON = V+ = 28V, V_CC = V_DD = 0 or 5V
105
µA
<1
5
Standby Supply Current
(LDOIN, MAX1541 Only)
ON1 = ON2 = GND, V_LDOON = V+ = 28V
100
µA
Shutdown Supply Current (V_CC)
Shutdown Supply Current
(V_DD, MAX1541 Only)
ON1 = ON2 = LDOON = GND
ON1 = ON2 = LDOON = GND
<1
5
µA
<1
5
µA
Shutdown Supply Current (V+)
MAX1540A: ON1 = ON2 = LDOON = GND,
V+ = 28V, V_CC = 0 or 5V
MAX1541: ON1 = ON2 = LDOON = GND,
V+ = 28V, V_CC = V_DD = 0 or 5V
4
15
µA
<1
5
Shutdown Supply Current
(LDOIN, MAX1541 Only)
LDOON = GND
4
10
µA
PWM CONTROLLERS
MAX1540A Main Output-Voltage
Accuracy (OUT1) (Note 2)
V_OUT1
V_FB1
Preset output,
V+ = 5.5V to 28V,
SKIP = V_CC
FB1 = GND
FB1 = V_CC
Adjustable output, V+ = 5.5V to 28V,
SKIP = V_CC
1.782 1.80 1.818
1.188 1.20 1.212
V
0.693 0.70 0.707
MAX1540A Secondary Output-
Voltage Accuracy (OUT2)
(Note 2)
V_OUT2
V_FB2
Preset output,
V+ = 5.5V to 28V,
SKIP = V_CC
FB2 = GND
FB2 = V_CC
Adjustable output, V+ = 5.5V to 28V,
SKIP = V_CC
2.475 2.50 2.525
1.485 1.50 1.515
V
0.693 0.70 0.707
MAX1541 Main Feedback-
Voltage Accuracy (FB1)
V_FB1
V+ = 4.5V to 28V,
SKIP = V_CC
REFIN1 = 0.35 x REF 0.693 0.70 0.707
V
MAX1541 Secondary Output-
Voltage Accuracy (OUT2)
(Note 2)
Load-Regulation Error
Line-Regulation Error
FB_ Input Bias Current
Output Adjust Range
V_OUT2
V_FB2
I_FB_
Preset output,
V+ = 4.5V to 28V,
SKIP = V_CC
FB2 = GND
FB2 = V_CC
Adjustable output, V+ = 4.5V to 28V,
SKIP = V_CC
I_LOAD = 0 to 3A, SKIP = V_CC
V_CC = 4.5V to 5.5V, V+ = 4.5V to 28V
2.475 2.50 2.525
1.782 1.80 1.818
V
0.693 0.70 0.707
0.1
%
0.25
%
-0.1
+0.1
µA
0.7
5.5
V
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