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PDF MAX20003 Data sheet ( Hoja de datos )
| Número de pieza | MAX20003 | |
| Descripción | 2A/3A Fully Integrated Step-Down Converters | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX20003 (archivo pdf) en la parte inferior de esta página. Total 19 Páginas | ||
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MAX20002/MAX20003
EVALUATION KIT AVAILABLE
36V, 220kHz to 2.2MHz, 2A/3A Fully
Integrated Step-Down Converters
with 15μA Operating Current
General Description
The MAX20002/MAX20003 are small, synchronous
buck converters with integrated high-side and low-side
MOSFETs. Each device is designed to deliver up to 2A/3A
with input voltages from 3.5V to 36V, while using only
15µA quiescent current at no load. Voltage quality can be
monitored by observing the PGOOD signal. The devices
can operate in dropout by running at 98% duty cycle,
making them ideal for automotive applications.
The devices offer fixed output voltages of 5V/3.3V, along
with the ability to program the output voltage between 1V
to 10V. Frequency can be programmed using a resistor
to ground on the FOSC pin from 220kHz to 2.2MHz. The
devices offer a forced fixed-frequency mode and skip
mode with ultra-low quiescent current of 15µA. They have
a pin that can be programmed to turn on/off the spread
spectrum, further helping systems designers with better
EMC management.
The MAX20002/MAX20003 are available in a small 5mm x
5mm 20-pin TQFN package with exposed pad and use very
few external components.
Applications
●● Point-of-Load Applications in Automotive
●● Distributed DC Power Systems
●● Navigation and Radio Head Units
Benefits and Features
●● Synchronous DC-DC Converter with Integrated FETs
• MAX20002 = 2A
• MAX20003 = 3A
• 15µA Quiescent Current When in Standby Mode
●● Small Solution Size Saves Space
• 220kHz to 2.2MHz Adjustable Frequency
• Programmable 1V to 10V Output for the Buck or
Fixed 5V/3.3V Options Available
• Fixed 8ms Internal Soft-Start
• Fixed Output Voltage with ±2% Output Accuracy
(5V/3.3V) or Externally Resistor Adjustable (1V to
10V) with ±1% FB Accuracy
●● PGOOD Output and High-Voltage EN Input Simplify
Power Sequencing
●● Protection Features and Operating Range Ideal for
Automotive Applications
• Operating VIN Range of 3.5V to 36V
• 42V Load-Dump Protection
• 99% Duty-Cycle Operation with Low Dropout
• -40°C to +125°C Automotive Temperature Range
• AEC-Q100 Qualified
Ordering Information appears at end of data sheet.
19-7311; Rev 5; 4/16
1 page  
MAX20002/MAX20003
36V, 220kHz to 2.2MHz, 2A/3A Fully
Integrated Step-Down Converters
with 15μA Operating Current
Electrical Characteristics (continued)
VSUP = VSUPSW = 14V, VEN = 14V, L1 = 2.2µH, CIN = 4.7µF, COUT = 44µF, CBIAS = 2.2µF, CBST = 0.1µF, RFOSC = 12kΩ, TA = TJ =
-40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.
PARAMETER
SYMBOL
CONDITIONS
Oscillator Frequency
RFOSC = 73.2kΩ
RFOSC = 12kΩ
SYNC, EN, AND SPS LOGIC THRESHOLDS
External Input Clock Acquisition
Time
tFSYNC
External Input Clock Frequency
RFOSC = 12kΩ (Note 4)
External Input Clock High
Threshold
VFSYNC_HI VFSYNC rising
External Input Clock Low
Threshold
VFSYNC_LO VFSYNC falling
FSYNC Leakage Current
Soft-Start Time
Enable Input High Threshold
Enable Input Low Threshold
Enable Threshold-Voltage
Hysteresis
tSS
VEN_HI
VEN_LO
TA = +25°C
VEN_HYS
Enable Input Current
Spread-Spectrum Input High
Threshold
IEN
VSPS_HI
TA = +25°C
Spread-Spectrum Input Low
Threshold
VSPS_LO
Spread-Spectrum Input Current
ISPS
TA = +25°C
POWER-GOOD AND OVERVOLTAGE-PROTECTION THRESOLDS
PGOOD Switching Level
PGOOD Debounce Time
VRISING VFB rising, VPGOOD = high
VFALLING VFB falling, VPGOOD = low
PGOOD Output Low Voltage
PGOOD Leakage Current
ISINK = 5mA
VOUT in regulation, TA = +25°C
VOUT rising (Monitor FB pin)
Overvoltage Protection
Threshold
VOUT falling (Monitor FB pin)
VOUT rising (Monitor FB pin)
(MAX20002C/MAX20003C only)
VOUT falling (Monitor FB pin)
(MAX20002C/MAX20003C only)
MIN
TYP
MAX UNITS
400 kHz
2.0 2.2 2.4 MHz
1 Cycle
1.8 2.6 MHz
1.4 V
0.4
1
5.6 8
12
2.4
0.6
0.2
0.1 1
2.0
V
µA
ms
V
V
V
µA
V
0.4
0.1 1
V
µA
93 95 97
90 92.5 95 %VFB
25 µs
0.4 V
1 µA
107
104
105 %
103
Note 2: Device not in dropout condition.
Note 3: Guaranteed by design; not production tested.
Note 4: Contact the factory for SYNC frequency outside the specified range.
www.maximintegrated.com
Maxim Integrated │ 5
5 Page 
MAX20002/MAX20003
36V, 220kHz to 2.2MHz, 2A/3A Fully
Integrated Step-Down Converters
with 15μA Operating Current
FB
AGND
COMP
FOSC
SPS
FSYNC
OUT PGOOD
PGOOD HIGH LEVEL
PGOOD LOW LEVEL PGOOD
COMPARATOR
FEEDBACK
SELECT
LOGIC
MAX20002
MAX20003
EN SUP
BIAS
INTERNAL BIAS
REGULATOR
SWITCHOVER
LOGIC
PV
PV
INTERNAL
SOFT-START
VREF = 1V
PWM
EAMP
CONTROL
LOGIC
PV
CLK
SPREAD
SPECTRUM
ON/OFF
FSYNC
SELECT
LOGIC
OSCILLATOR
EXTERNAL
CLOCK
SLOPE COMP
LOGIC
CONNECTED HI
(PWM MODE)
CONNECTED LO
(SKIP MODE)
ZERO-
CROSSING
COMPARATOR
LX
CURRENT-LIMIT
THRESHOLD
SUPSW
BST
LX
PGND
Figure 1. Internal Block Diagram
www.maximintegrated.com
Maxim Integrated │ 11
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet MAX20003.PDF ] | |
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