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MAX20057 Datasheet(PDF) 4 Page - Maxim Integrated Products

Part # MAX20057
Description  36V Boost Controller with Two Synchronous
PDF  26 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX20057 Datasheet(HTML) 4 Page - Maxim Integrated Products

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Electrical Characteristics (continued)
(VSUP = VSUPSW_ = 14V, VEN_ = 14V, TJ = -40ºC to +150ºC, unless otherwise noted. Typical values are at TA = +25ºC) (Notes 3 and
4)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Current
IIN
VEN1 = VEN2 = VEN3 = 0V
1
5
µA
VEN1 = VSUP, VOUT1 =5V, VEN2 = VEN3
= 0V, VEXTVCC = 5V, No Switching
10
18
VEN2 = VSUP, VOUT2 = 3.3V,
VEN1 = VEN3 = 0V, VEXTVCC = 3.3V,
No Switching
8
12
VEN1 = VEN2 = VSUP, VOUT1 = 5V,
VOUT2 = 3.3V, VEN3 = VSUP, VEXTVCC =
3.3V, VFB3 > 1V,
No Switching
30
Buck1 Fixed Output
Voltage
VOUT1
VFB1 = VBIAS, VOUT1 = 5V, PWM mode
4.9
5
5.1
V
VFB1 = VBIAS, VOUT1 = 5V, skip mode
4.85
5
5.15
Buck2 Fixed Output
Voltage
VOUT2
VFB2 = VBIAS, VOUT2 = 3.3V, PWM
mode
3.234
3.3
3.366
V
VFB2 = VBIAS, VOUT2 = 3.3V, skip mode
3.2
3.3
3.4
Output Voltage
Adjustable Range
Buck1, Buck2 (Note 5)
1
14
V
Regulated Feedback
Voltage
VFB1, VFB2
0.985
1
1.015
V
Feedback Leakage
Current
IFB1, IFB2
TA = +25°C
0.01
1
μA
Feedback Line
Regulation Error
VSUP = 3.5V to 36V, VFB_ = 1V
0.01
%/V
Dead time
Buck1, Buck2 (Note 5)
3
ns
Maximum Duty Cycle
Buck1, Buck2
95
%
Minimum On-Time
tON_MIN
Buck1, Buck2 (Note 5)
20
ns
PWM Switching
Frequency Range
fSW
OTP Option of 400kHz (see the Ordering
Information for exact part number)
2.1
MHz
Switching Frequency
Accuracy
1.9
2.1
2.32
MHz
Current-Limit
Buck1
4.5
6
7.5
A
Buck2
2.5
3.5
4.5
Soft-Start Ramp Time
Buck1 and Buck2, fixed soft-start time
regardless of frequency.
3
5.5
7
ms
Phase Shift Between
Buck1 and Buck 2
PWM Operation (Note 5)
180
deg
LX1, LX2 Leakage
Current
VIN = 6V, VLX_ = VPGND_ or VIN, TA =
+25°C
0.001
5
μA
High-Side Switch On
Resistance
RON_H_
BUCK1
ILX1 = 1A, VBIAS = 5V
50
mΩ
RON_H_
BUCK2
ILX2 = 1A , VBIAS = 5V
100
MAX20057
36V Boost Controller with Two Synchronous Buck
Converters (3.5A/2A) for Automotive Applications
www.maximintegrated.com
Maxim Integrated | 4



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