OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

MAX17083ETG+T

P1-P3P4-P6P7-P9P10-P12P13-P15
General Description
The MAX17083 is a fixed-frequency, current-mode,
step-down regulator optimized for low-voltage, low-
power applications. This regulator features dual internal
n-channel MOSFET power switches for high efficiency
and reduced component count. External Schottky
diodes are not required. An integrated boost switch
eliminates the need for an external boost diode. The
internal 25mΩ low-side power MOSFET easily supports
continuous load currents up to 5A. The MAX17083 pro-
duces an adjustable 0.75V to 2.7V output voltage from
the system’s 3.3V or 5V input supply.
This step-down regulator uses a peak current-mode
control scheme to eliminate the additional external
compensation required by voltage-mode architectures,
providing an easy-to-implement architecture without
sacrificing fast transient response. The MAX17083 pro-
vides peak current-limit protection and operates in
light-load pulse-skipping mode to maintain high effi-
ciency under light-load conditions.
Independent enable input and open-drain power-good
output allow flexible system power sequencing. The volt-
age soft-start gradually ramps up the output voltage
within a predictable time period, effectively limiting the
inrush current. The MAX17083 features output undervolt-
age, output overvoltage, and thermal-fault protection.
The MAX17083 is available in a 24-pin 4mm x 4mm x
0.75mm TQFN package. The exposed backside pad
improves thermal characteristics.
Features
o Fixed-Frequency, Current-Mode Controller
o 2.4V to 5.5V Input Range
o Internal 5A Step-Down Regulator
o Internal BST Switch
o Fault Protection: Undervoltage, Overvoltage,
Thermal, Peak Current Limit
o Enable Input and Power-Good Output
o Voltage-Controlled Soft-Start
o High-Impedance Shutdown
o < 1µA (typ) Shutdown Current
MAX17083
Low-Voltage, Internal Switch,
Step-Down Regulator
________________________________________________________________
Maxim Integrated Products
1
TQFN
4mm x 4mm
+
MAX17083
19
20
21
22
12 3456
18 17 16 15 14 13
23
24
12
11
10
9
8
7
N.C.
PGND
PGND
PGND
N.C.
LX
LX
IN
IN
FREQ
POK
LX
LX
EN
V
CC
SET
PGND
FB
GND
N.C.
GND
REF
GND
BST
TOP VIEW
Pin Configuration
19-4458; Rev 0; 2/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Ordering Information
PART TEMP RANGE PIN-PACKAGE
MAX17083ETG+ -40°C to +85°C 24 TQFN
+
Denotes a lead(Pb)-free/RoHS-compliant package.
Applications
Low-Power Architectures
Ultra-Mobile PCs
Netbook and Nettop PCs
Portable Gaming
Notebook and Subnotebook Computers
PDAs and Mobile Communicators
MAX17083
Low-Voltage, Internal Switch,
Step-Down Regulator
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V
IN
= V
FREQ
= V
CC
= V
EN
= 5V, I
REF
= no load, T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C.)
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.
IN to PGND...............................................................-0.3V to +6V
V
CC
to GND..............................................................-0.3V to +6V
EN to GND................................................................-0.3V to +6V
REF, FB, SET, FREQ, POK to GND ............-0.3V to (V
CC
+ 0.3V)
LX to GND (Notes 1, 2)................................-0.6V to (V
IN
+ 0.3V)
BST to GND.........................................(V
CC
- 0.3V) to (V
LX
+ 6V)
GND to PGND (Note 2) .........................................-0.3V to +0.3V
REF Short-Circuit Current......................................................1mA
Continuous Power Dissipation, Multilayer PCB (T
A
= +70°C)
24-Pin, 4mm x 4mm TQFN
(derate 27.8mW/°C above +70°C) ........................2222mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
IN Input Voltage Range V
IN
2.4 5.5 V
V
CC
Input Voltage Range V
CC
4.5 5.5 V
IN Undervoltage Threshold No hysteresis 2.1 2.4 V
Vcc Undervoltage Threshold Rising edge, 160mV hysteresis 4.2 4.5 V
Shutdown Supply Current EN = GND, measured at V
CC
, T
A
= +25°C 0.1 1.0 μA
Supply Current Regulator enabled 65 95 μA
REFERENCE
Reference Output Voltage V
REF
No load 1.24 1.25 1.26 V
Reference Load Regulation -1μA < I
REF
< +50μA 3 10 mV
OSCILLATOR
Oscillator Frequency f
OSC
FREQ = GND 0.45 0.50 0.55 MHz
FREQ = V
CC
1.50
FREQ = open 1.00
FREQ = REF 0.75
FREQ Settings
FREQ = GND 0.50
MHz
INTERNAL 5A STEP-DOWN CONVERTER
SET = GND 0.754 0.765 0.774
SET = REF 1.107 1.122 1.136
SET = open 1.51 1.53 1.55
FB Regulation Voltage
(No Load)
V
FB
No load
SET = 5V 1.812 1.836 1.86
V
SET = GND 0.72 0.774
SET = REF 1.07 1.136
SET = open 1.45 1.55
FB Regulation Voltage
(Full Load)
V
FB
I
OUT
= 4A
SET = 5V 1.76 1.86
V
Note 1: LX has clamp diodes to PGND and IN. If continuous current is applied through these diodes, thermal limits must be observed.
Note 2: Measurements valid using 20MHz bandwidth limit.
MAX17083
Low-Voltage, Internal Switch,
Step-Down Regulator
_______________________________________________________________________________________ 3
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
FB Load Regulation SET = GND -4 mV/A
FB Line Regulation
(Slope Compensation)
V
FB
SET = GND, 0 to 100% duty cycle,
V
CC
= 4.5V to 5.5V
10 15 20 mV
FB Input Current I
FB
SET = GND, T
A
= +25°C -100 -5 +100 nA
High-side n-channel R
DH
32 50
Internal MOSFET On-Resistance
(Note 3)
Low-side n-channel R
DL
17 30
m
Internal BST On-Resistance 2
LX Peak Current Limit 5 6 8 A
LX Idle Mode™ Trip Level 1.5 A
LX Zero-Crossing Trip Level 100 mA
Soft-Start Ramp Time T
SS
1939/
f
SW
ms
Soft-Start Fault Blanking Time T
SSLT
3232/
f
SW
ms
POK Upper Trip Threshold and
Overvoltage Fault Threshold
Rising edge, 50mV hysteresis 9 12 14 %
POK Lower Trip Threshold Falling edge, 50mV hysteresis -14 -12 -9 %
POK Propagation Delay Time t
POK
FB forced 50mV beyond POK trip threshold 5 μs
Overvoltage Fault Latch
Delay Time
FB forced 50mV above POK upper trip
threshold
5 μs
Undervoltage Fault Latch
Delay Time
FB forced 50mV below POK lower trip
threshold, TUV
1534/
f
SW
ms
POK Output Low Voltage I
SINK
= 3mA 0.4 V
POK Leakage Current I
POK
SET = GND, FB = 1V (POK high impedance),
POK forced to 5.5V, T
A
= +25°C
1 μA
Thermal-Shutdown Threshold T
SHDN
Hysteresis = 15°C +160 °C
LOGIC IN PUTS
EN Input High Threshold Rising, hysteresis = 220mV (typ) 1.0 1.4 1.6 V
EN Input Bias Current T
A
= +25°C 0.1 1 μA
V
CC
V
CC
-
0.5
Open 3 3.2
REF 1.2 2.2
FREQ and SET Input Voltage
Levels
GND 0.5
V
FREQ and SET Input Bias
Currents
T
A
= +25°C -2 +0.1 +2 μA
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
IN
= V
FREQ
= V
CC
= V
EN
= 5V, I
REF
= no load, T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C.)
Idle Mode is a trademark of Maxim Integrated Products, Inc.
P1-P3P4-P6P7-P9P10-P12P13-P15

MAX17083ETG+T

Mfr. #:
Buy MAX17083ETG+T
Manufacturer:
Maxim Integrated
Description:
Switching Voltage Regulators Low-Voltage Internal Switch Step-Down
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet