• Bootstrapped Mode Allows Input Voltage to be 2.5V
• Adjustable Slope Compensation
●
Reduces Power Dissipation
•
>90% Peak Efficiency
•
Low 4μA (typ.) Shutdown Current
●
Operates Reliably
• 42V Input Voltage Transient Protection
• Fixed 9ms Internal Software Start Reduces Input
Inrush Current
• PGOOD Output and Hiccup Mode for Enhanced
System Protection
• Overtemperature Shutdown
• Reduced EMI Emission with Spread-Spectrum
Control
Applications
●
●
●
●
Distributed Supply Regulation
Offline Power Supplies
Telecom Hardware
General-Purpose Point-of-Load
Typical Application Circuit
22µF
BOOTSTRAPPED 2.2MHz APPLICATION WITH LOW OPERATING VOLTAGE
BATTERY INPUT
2.5V to 40V
0.47µH
47µF
CERAMIC
SW_OUT
8V/2A
PVL
SUP
10kΩ
PGOOD
PVL
2.2µF
DRV
1kΩ
ISNS
22mΩ
N
91kΩ
MAX17292EUBA/B
FB
FSET/SYNC
12kΩ
GND
COMP
13kΩ
EN
ENABLE
Ordering Information
appears at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
19-8544; Rev 0; 8/16
MAX17290/MAX17292
2.5V to 36V, 2.5MHz, PWM Boost Controller
with 4µA Shutdown Current and Reduced EMI
Absolute Maximum Ratings
EN, SUP, OVP, FB to GND ....................................-0.3V to +42V
DRV, SYNCO, FSET/SYNC, COMP,
PGOOD, ISNS, REFIN to GND ............ -0.3V to (V
PVL
+ 0.3V)
PVL to GND ............................................................... -0.3V to 6V
Continuous Power Dissipation (T
A
= +70NC)
μMAX
on SLB (derate 10.3mW/NC above +70NC) ......825mW
μMAX
on MLB (derate 12.9mW/NC above +70NC)....1031mW
TQFN on SLB (derate 13.2mW/NC above +70NC) .....1053mW
TQFN on MLB (derate 14.7mW/NC above +70NC) ....1176mW
Operating Temperature Range .......................... -40NC to +85NC
Maximum Junction Temperature.....................................+150NC
Storage Temperature Range............................ -65NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
Stresses beyond those listed under “Absolute Maximum Ratings” 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.
Package Thermal Characteristics
(Note 1)
μMAX
(Single-Layer Board)
Junction-to-Ambient Thermal Resistance (B
JA
) ..........97NC/W
Junction-to-Case Thermal Resistance (B
JC
) .................5NC/W
μMAX
(Four-Layer Board)
Junction-to-Ambient Thermal Resistance (B
JA
) ..........78NC/W
Junction-to-Case Thermal Resistance (B
JC
) .................5NC/W
TQFN (Single-Layer Board)
Junction-to-Ambient Thermal Resistance (B
JA
) ..........76NC/W
Junction-to-Case Thermal Resistance (B
JC
) ...............11NC/W
TQFN (Four-Layer Board)
Junction-to-Ambient Thermal Resistance (B
JA
) ..........68NC/W
Junction-to-Case Thermal Resistance (B
JC
) ...............11NC/W
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to
www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(V
SUP
= 14V, T
A
= T
J
= -40NC to +85NC, unless otherwise noted. Typical values are at T
A
=+25NC.) (Note 2)
PARAMETER
POWER SUPPLY
SUP Operating Supply Range
SUP Supply Current in Operation
SUP Supply Current in Shutdown
OVP Threshold Voltage
OVP Threshold Voltage
Hysteresis
OVP Input Current
PVL REGULATOR
PVL Output Voltage
PVL Undervoltage Lockout
PVL Undervoltage-Lockout
Hysteresis
V
PVL
V
UV
V
UVH
SUP rising
4.7
3.8
5
4
0.4
5.45
4.3
V
V
V
V
SUP
I
CC
I
SHDN
V
OVP
V
OVPH
I
OVP
-1
V
FB
= 1.1V, no
switching
V
EN
= 0V
OVP rising
105
MAX17290
MAX17292
4.5
0.75
1.25
4
110
2.5
+1
36
1.3
2
7
115
V
mA
FA
% of
V
FB
% of
V
FB
FA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
www.maximintegrated.com
Maxim Integrated
│
2
MAX17290/MAX17292
2.5V to 36V, 2.5MHz, PWM Boost Controller
with 4µA Shutdown Current and Reduced EMI
Electrical Characteristics (continued)
(V
SUP
= 14V, T
A
= T
J
= -40NC to +85NC, unless otherwise noted. Typical values are at T
A
=+25NC.) (Note 2)
PARAMETER
OSCILLATOR
Switching Frequency
Spread-Spectrum Spreading
Factor
Switching Frequency Range
FSET/SYNC Frequency Range
FSET Regulation Voltage
Soft-Start Time
Hiccup Period
Maximum Duty Cycle
Minimum On-Time
THERMAL SHUTDOWN
Thermal-Shutdown Temperature
Thermal-Shutdown Hysteresis
GATE DRIVERS
DRV Pullup Resistance
DRV Pulldown Resistance
DRV Output Peak Current
REGULATION/CURRENT SENSE
V
REFIN
= V
PVL
FB Regulation Voltage
FB Input Current
ISNS Threshold
ISNS Leading-Edge Blanking
Time
Current-Sense Gain
Peak Slope Compensation
Current-Ramp Magnitude
PGOOD Threshold
V
PG
t
BLANK
A
VI
Added to ISNS input
Percentage of final
value
Rising
Falling
40
85
80
MAX16990
MAX16992
V
FB
I
FB
V
REFIN
= 2V
V
REFIN
= 0.5V
Across full line, load,
and temperature
range
0.99
1.98
0.495
-0.5
212
250
60
40
8
50
90
85
60
95
90
1
2
0.5
1.01
2.02
0.505
+0.5
288
FA
mV
ns
V/V
FA
%
V
R
DRVH
R
DRVL
I
DRV
I
DRV
= 100mA
I
DRV
= -100mA
Sourcing, C
DRV
= 10nF
Sinking, C
DRV
= 10nF
3
1.4
0.75
1
5.5
2.5
I
I
A
T
S
T
H
Temperature rising
165
10
NC
NC
f
SW
SS
f
SWR
f
SYNC
V
FSET
t
SS
t
HICCUP
DC
MAX
t
ON
MAX17290, R
FSET
= 69kI
MAX17292, R
FSET
= 12kI
93
85
50
80
110
R
FSET
= 69kI
R
FSET
= 12kI
B, D, and F versions
When set with
resistor on pin
Using external
SYNC signal
12kI < R
FSET
< 69kI
Internally set
MAX17290
MAX17292
MAX17290
MAX17292
100
1000
220
1000
0.9
6
9
55
12
360
2000
400
2200
Q6
1000
2500
1000
2500
440
2400
kHz
% of
f
SW
kHz
kHz
V
ms
ms
%
ns
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
www.maximintegrated.com
Maxim Integrated
│
3
MAX17290/MAX17292
2.5V to 36V, 2.5MHz, PWM Boost Controller
with 4µA Shutdown Current and Reduced EMI
Electrical Characteristics (continued)
(V
SUP
= 14V, T
A
= T
J
= -40NC to +85NC, unless otherwise noted. Typical values are at T
A
=+25NC.) (Note 2)
PARAMETER
ERROR AMPLIFIER
REFIN Input Voltage Range
REFIN Threshold for 1V FB
Regulation
Error-Amplifier g
m
Error-Amplifier Output
Impedance
COMP Output Current
COMP Clamp Voltage
LOGIC-LEVEL INPUTS/OUTPUTS
PGOOD/SYNCO Output Leakage
Current
PGOOD/SYNCO Output Low
Level
EN High Input Threshold
EN Low Input Threshold
FSET/SYNC High Input Threshold
FSET/SYNC Low Input Threshold
EN and REFIN Input Current
-1
Note 2:
All devices 100% production tested at T
A
= +25NC. Limits over temperature are guaranteed by design.
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
