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PDF MAX15062 Data sheet ( Hoja de datos )
| Número de pieza | MAX15062 | |
| Descripción | Synchronous Step-Down DC-DC Converters | |
| Fabricantes | Maxim Integrated | |
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Hay una vista previa y un enlace de descarga de MAX15062 (archivo pdf) en la parte inferior de esta página. Total 23 Páginas | ||
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MAX15062
EVALUATION KIT AVAILABLE
60V, 300mA, Ultra-Small, High-Efficiency,
Synchronous Step-Down DC-DC Converters
General Description
The MAX15062 high-efficiency, high-voltage, synchronous
step-down DC-DC converter with integrated MOSFETs
operates over a 4.5V to 60V input voltage range. The
converter delivers output current up to 300mA at 3.3V
(MAX15062A), 5V (MAX15062B), and adjustable output
voltages (MAX15062C). The device operates over the
-40°C to +125°C temperature range and is available in a
compact 8-pin (2mm x 2mm) TDFN package. Simulation
models are available.
The device employs a peak-current-mode control archi-
tecture with a MODE pin that can be used to operate the
device in pulse-width modulation (PWM) or pulse-fre-
quency modulation (PFM) control schemes. PWM opera-
tion provides constant frequency operation at all loads
and is useful in applications sensitive to variable switch-
ing frequency. PFM operation disables negative inductor
current and additionally skips pulses at light loads for high
efficiency. The low-resistance on-chip MOSFETs ensure
high efficiency at full load and simplify the PCB layout.
To reduce input inrush current, the device offers an
internal soft-start. The device also incorporates an EN/
UVLO pin that allows the user to turn on the part at the
desired input-voltage level. An open-drain RESET pin can
be used for output-voltage monitoring.
Applications
● Process Control
● Industrial Sensors
● 4–20mA Current Loops
● HVAC and Building Control
● High-Voltage LDO Replacement
● General-Purpose Point-of-Load
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part, refer
to www.maximintegrated.com/MAX15062.related.
Benefits and Features
● Eliminates External Components and Reduces
Total Cost
• No Schottky—Synchronous Operation for High
Efficiency and Reduced Cost
• Internal Compensation
• Internal Feedback Divider for Fixed 3.3V, 5V
Output Voltages
• Internal Soft-Start
• All-Ceramic Capacitors, Ultra-Compact Layout
● Reduces Number of DC-DC Regulators to Stock
• Wide 4.5V to 60V Input Voltage Range
• Fixed 3.3V and 5V Output Voltage Options
• Adjustable 0.9V to 0.89 x VIN Output Voltage
Option
• Delivers Up to 300mA Load Current
• Configurable Between PFM and Forced-PWM
Modes
● Reduces Power Dissipation
• Peak Efficiency = 92%
• PFM Feature for High Light-Load Efficiency
• Shutdown Current = 2.2µA (typ)
● Operates Reliably in Adverse Industrial Environments
• Hiccup-Mode Current Limit and Autoretry Startup
• Built-In Output Voltage Monitoring with Open-Drain
RESET Pin
• Programmable EN/UVLO Threshold
• Monotonic Startup into Prebiased Output
• Overtemperature Protection
• -40°C to +125°C Automotive/Industrial
Temperature Range
Typical Operating Circuit
VIN
4.5V TO
60V CIN
1µF
CVCC
1µF
VIN LX
EN/UVLO
GND
MAX15062A
VCC RESET
L1
33µH
MODE
VOUT
COUT
10µF
VOUT
3.3V,
300mA
19-6685; Rev 1; 10/13
1 page  
MAX15062
60V, 300mA, Ultra-Small, High-Efficiency,
Synchronous Step-Down DC-DC Converters
Typical Operating Characteristics
(VIN = 24V, VGND = 0V, CIN = CVCC = 1µF, VEN/UVLO = 1.5V, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
100
VIN = 12V
90
VIN = 24V
80
70
60
50
40
30
1
VIN = 36V
VIN = 48V
FIGURE 5 APPLICATION
CIRCUIT, PFM MODE
VOUT = 3.3V
10 100
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
100 toc02b
VIN = 24V
90 VIN = 18V
80
70
60
50
40
1
VIN = 60V
VIN = 48V
VIN = 36V
FIGURE 8 APPLICATION
CIRCUIT, PFM MODE
VOUT = 12V
10 100
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
100
90 VIN = 6V
toc04a
80
70
VIN = 12V
60
50 VIN = 24V
40 VIN = 36V
30
20
10
0
0
VIN = 48V
FIGURE 7 APPLICATION
CIRCUIT, PWM MODE
VOUT = 2.5V
50 100 150 200 250 300
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
100
VIN = 12V
90 VIN = 24V
80
70
60 VIN = 36V
50
40
30
1
VIN = 48V
FIGURE 6 APPLICATION
CIRCUIT, PFM MODE
VOUT = 5V
10 100
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
100
90 VIN = 12V
80
70 VIN = 24V
60 VIN = 36V
50
40 VIN = 48V
30
20
10
0
0
FIGURE 5 APPLICATION
CIRCUIT, PWM MODE
VOUT = 3.3V
50 100 150 200 250 300
LOAD CURRENT (mA)
100
90
80
70
60
50
40
30
20
1
EFFICIENCY vs. LOAD CURRENT
toc02a
VIN = 12V
VIN = 6V
VIN = 48V
VIN = 24V
VIN = 36V
FIGURE 7 APPLICATION
CIRCUIT, PFM MODE
VOUT = 2.5V
10 100
LOAD CURRENT (mA)
100
90
80
70
60
50
40
30
20
10
0
0
EFFICIENCY vs. LOAD CURRENT
VIN = 24V
VIN = 36V
VIN = 12V
VIN = 48V
FIGURE 6 APPLICATION
CIRCUIT, PWM MODE
VOUT = 5V
50 100 150 200 250 300
LOAD CURRENT (mA)
100
90
80
70
60
50
40
30
20
10
0
0
EFFICIENCY VS. LOAD CURRENT
toc04b
VIN = 18V
VIN = 24V
VIN = 36V
VIN = 48V
VIN = 60V
FIGURE 8 APPLICATION
CIRCUIT, PWM MODE
VOUT = 12V
50 100 150 200 250 300
LOAD CURRENT (mA)
3.37
3.36
3.35
3.34
3.33
3.32
3.31
3.30
3.29
0
OUTPUT VOLTAGE
vs. LOAD CURRENT
FIGURE 5 APPLICATION
CIRCUIT, PFM MODE
VIN = 12V, 24V
VIN = 36V
VIN = 48V
50 100 150 200 250 300
LOAD CURRENT (mA)
www.maximintegrated.com
Maxim Integrated │ 5
5 Page 
MAX15062
60V, 300mA, Ultra-Small, High-Efficiency,
Synchronous Step-Down DC-DC Converters
Typical Operating Characteristicsc (continued)
(VIN = 24V, VGND = 0V, CIN = CVCC = 1µF, VEN/UVLO = 1.5V, TA = +25°C, unless otherwise noted.)
VOUT (AC)
20mV/div
NO-LOAD SWITCHING WAVEFORMS
(PWM MODE)
MAX15062 toc28
VOUT = 5V
VLX
10V/div
IOUT
100mA /div
VEN / UVLO
5V/div
2µs /div
SOFT-START
MAX15062 toc30
VOUT
1V/div
IOUT
100mA /div
VRESET
5V/div
VEN/UVLO
5V/div
VOUT
5V/div
IOUT
100mA/div
VRESET
5V/div
FIGURE 6
APPLICATION CIRCUIT
VOUT = 5V
1ms /div
SOFT-START
toc30b
FIGURE 8
APPLICATION CIRCUIT
VOUT = 12V
1ms/div
VEN / UVLO
5V/div
SOFT-START
MAX15062 toc29
VOUT
1V/div
IOUT
100mA /div
VRESET
5V/div
VEN/UVLO
5V/div
VOUT
1V/div
IOUT
100mA/div
5VVR/dESivET
FIGURE 5
APPLICATION CIRCUIT
VOUT = 3.3V
1ms /div
SOFT-START
toc30a
FIGURE 7
APPLICATION CIRCUIT
VOUT = 2.5V
1ms/div
VEN / UVLO
5V/div
VOUT
1V/div
IOUT
100mA /div
SHUTDOWN WITH ENABLE
MAX15062 toc31
VRESET
5V/div
400µs /div
www.maximintegrated.com
Maxim Integrated │ 11
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet MAX15062.PDF ] | |
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