DataSheet.es    


PDF MAX1541 Data sheet ( Hoja de datos )

Número de pieza MAX1541
Descripción (MAX1540 / MAX1541) Dual Step-Down Controllers with Saturation Protection / Dynamic Output and Linear Regulator
Fabricantes Maxim Integrated Products 
Logotipo Maxim Integrated Products Logotipo



Hay una vista previa y un enlace de descarga de MAX1541 (archivo pdf) en la parte inferior de esta página.


Total 49 Páginas

No Preview Available ! MAX1541 Hoja de datos, Descripción, Manual

19-2861; Rev 2; 1/05
EVAALVUAAILTAIOBNLEKIT
Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
General Description
The MAX1540/MAX1541 dual pulse-width modulation
(PWM) controllers provide the high efficiency, excellent
transient response, and high DC-output accuracy nec-
essary for stepping down high-voltage batteries to gen-
erate low-voltage chipset and RAM power supplies in
notebook computers.
The Maxim proprietary Quick-PWM™ controllers are
free running, constant on-time with input feed forward.
This configuration provides ultra-fast transient
response, wide input-output (I/O) differential range, low
supply current, and tight load-regulation characteris-
tics. The controllers can accurately sense the inductor
current across an external current-sense resistor in
series with the output to ensure reliable overload and
inductor saturation protection. Alternatively, the con-
trollers can use the synchronous rectifier itself or loss-
less inductor current-sensing methods to provide
overload protection with lower power dissipation.
For a single step-down PWM controller with inductor-
saturation protection, external-reference input voltage,
and dynamically selectable output voltages, refer to the
MAX1992/MAX1993 data sheet.
Applications
Notebook Computers
Core/IO Supplies as Low as 0.7V
0.7V to 5.5V Supply Rails
CPU/Chipset/GPU with Dynamic Voltage Core
Supplies (MAX1541)
DDR Memory Termination (MAX1541)
Active Termination Buses (MAX1541)
Features
Inductor-Saturation Protection
Accurate Differential Current-Sense Inputs
Dual Ultra-High-Efficiency Quick-PWMs with
100ns Load-Step Response
MAX1540
1.8V/1.2V Fixed or 0.7V to 5.5V Adjustable
Output (OUT1)
2.5V/1.5V Fixed or 0.7V to 5.5V Adjustable
Output (OUT2)
Fixed 5V, 100mA Linear Regulator
MAX1541
External Reference Input (REFIN1)
Dynamically Selectable Output Voltage—0.7V
to 5.5V (OUT1)
2.5V/1.8V Fixed or 0.7V to 5.5V Adjustable
Output (OUT2)
Optional Power-Good and Fault Blanking
During Transitions
Fixed 5V or Adjustable 100mA Linear Regulator
1% VOUT Accuracy over Line and Load
2V to 28V Battery Input Range
170kHz to 620kHz Selectable Switching
Frequency
Overvoltage/Undervoltage-Protection Option
1.7ms Digital Soft-Start
Drives Large Synchronous-Rectifier FETs
2V ±0.7% Reference Output
Separate Power-Good Window Comparators
Pin Configurations
TOP VIEW
PART
MAX1540ETJ
MAX1541ETL
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
32 Thin QFN 5mm x 5mm
40 Thin QFN 6mm x 6mm
OVP/UVP
SKIP
LSAT
TON
VCC
ILIM1
ILIM2
REF
1
2
3
4
5
6
7
8
MAX1540
24 LX1
23 BST1
22 LDOON
21 DL1
20 LDOOUT
19 V+
18 DL2
17 GND
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
THIN QFN
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

1 page




MAX1541 pdf
Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 15V, VCC = VDD = ON1 = ON2 = 5V, SKIP = GND, LDOIN (MAX1541) = V+, TA = 0°C to +85°C, unless otherwise noted. Typical
values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
REFERENCE (REF)
Reference Voltage
Reference Load Regulation
REF Lockout Voltage
VREF
VREF
VREF(UVLO)
VCC = 4.5V to 5.5V, TA = +25°C to +85°C
IREF = 0V
TA = 0°C to +85°C
IREF = -10µA to +50µA
Rising edge, hysteresis = 350mV
1.986
1.983
-0.01
2.00
2.00
1.95
2.014
2.017
+0.01
V
V
V
REFIN1 (MAX1541)
Voltage Range
VREFIN
0.7
VREF
V
REFIN1 (MAX1541)
Input Bias Current
IREFIN1
0.01 0.05
µA
FAULT DETECTION
Overvoltage Trip Threshold
With respect to error-comparator threshold,
OVP/UVP = VCC
12
16
20
%
Overvoltage Fault-Propagation
Delay
tOVP FB forced 2% above trip threshold
10 µs
Output Undervoltage-Protection
Trip Threshold
With respect to error-comparator threshold,
OVP/UVP = VCC
65
70
75
%
Output Undervoltage-Protection
Blanking Time
tBLANK From rising edge of ON_
10 35 ms
Output Undervoltage Fault-
Propagation Delay
tUVP
10 µs
PGOOD_ Lower Trip Threshold
With respect to error-comparator threshold,
hysteresis = 1%
-13
-10
-7
%
PGOOD_ Upper Trip Threshold
PGOOD_ Propagation Delay
PGOOD_ Output Low Voltage
PGOOD_ Leakage Current
Fault-Blanking Time
(MAX1541 Only)
Thermal-Shutdown Threshold
tPGOOD_
IPGOOD_
tFBLANK
TSHDN
With respect to error-comparator threshold,
hysteresis = 1%
FB forced 2% beyond PGOOD_ trip threshold
ISINK = 4mA
FB = REF (PGOOD high impedance),
PGOOD forced to 5.5V
FBLANK = VCC
FBLANK = open
FBLANK = REF
Hysteresis = 10°C
LDOON = VCC
LDOON = GND
+7
120
80
35
+10
10
220
140
65
+150
+160
+13
0.3
1
320
205
95
%
µs
V
µA
µs
°C
VCC Undervoltage-Lockout
Threshold
CURRENT LIMIT
ILIM_ Adjustment Range
Current-Limit Input Range
CSP_/CSN_ Input Current
VUVLO(VCC)
Rising edge, PWM disabled below this
level, hysteresis = 20mV
CSP_
CSN_
4.1 4.25 4.4
V
0.25 2 V
0 2.7
V
-0.3 +28
0.5 µA
_______________________________________________________________________________________ 5

5 Page





MAX1541 arduino
Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
Typical Operating Characteristics (continued)
(MAX1541 Circuit of Figure 12, VIN = 12V, VDD = VCC = 5V, SKIP = GND, TON = REF, TA = +25°C, unless otherwise noted.)
1.0V OUTPUT VOLTAGE (OUT1)
vs. LOAD CURRENT
1.02
SKIP = GND
SKIP = VCC
1.01
OUT2 SWITCHING FREQUENCY
vs. LOAD CURRENT
(VOUT2 = 2.5V)
600
500
400
OUT1 SWITCHING FREQUENCY
vs. LOAD CURRENT
(VOUT1 = 1.0V)
600
500
400
1.00 300 300
0.99
0.98
0
1234
LOAD CURRENT (A)
5
SWITCHING FREQUENCY
vs. INPUT VOLTAGE
450
2.5V OUTPUT
SKIP = VCC
400
4A LOAD
350
NO LOAD
300
250
200
0 4 8 12 16 20 24
INPUT VOLTAGE (V)
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE
(PULSE-SKIPPING OPERATION)
1.4
SKIP = GND
1.2 ON1 = ON2 = VCC
28
1.0
IBIAS
0.8
0.6
0.4
0.2
IIN
0
0 4 8 12 16 20 24 28
INPUT VOLTAGE (V)
200
100
0
0
SKIP = GND
SKIP = VCC
1234
LOAD CURRENT (A)
5
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
6.0
2.5V OUTPUT
5.8
5.6
5.4
5.2
5.0
4.8
4.6
4.4
4.2
4.0
0 4 8 12 16 20 24
INPUT VOLTAGE (V)
28
2.0V REFERENCE LOAD REGULATION
4
3
2
1
0
-1
-2
-3
-4
-20
0 20 40 60 80
REFERENCE LOAD CURRENT (µA)
100
200
100
0
0
20
SKIP = GND
SKIP = VCC
1234
LOAD CURRENT (A)
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE
(FORCED-PWM OPERATION)
5
16
IBIAS
12
IIN
8
4
SKIP = ON1 = ON2 = VCC
0
0 4 8 12 16 20 24 28
INPUT VOLTAGE (V)
REFERENCE DISTRIBUTION
50
SAMPLE SIZE = 50
40
30
20
10
0
1.990
1.995 2.000 2.005
REFERENCE VOLTAGE (V)
2.010
______________________________________________________________________________________ 11

11 Page







PáginasTotal 49 Páginas
PDF Descargar[ Datasheet MAX1541.PDF ]




Hoja de datos destacado

Número de piezaDescripciónFabricantes
MAX154CMOS High-Speed 8-Bit ADCs with Multiplexer and ReferenceMaxim Integrated
Maxim Integrated
MAX1540(MAX1540 / MAX1541) Dual Step-Down Controllers with Saturation Protection / Dynamic Output and Linear RegulatorMaxim Integrated Products
Maxim Integrated Products
MAX1540ADual Step-Down ControllersMaxim Integrated Products
Maxim Integrated Products
MAX1541(MAX1540 / MAX1541) Dual Step-Down Controllers with Saturation Protection / Dynamic Output and Linear RegulatorMaxim Integrated Products
Maxim Integrated Products

Número de piezaDescripciónFabricantes
SLA6805M

High Voltage 3 phase Motor Driver IC.

Sanken
Sanken
SDC1742

12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.

Analog Devices
Analog Devices


DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares,
permitiéndote verlos en linea o descargarlos en PDF.


DataSheet.es    |   2020   |  Privacy Policy  |  Contacto  |  Buscar