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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX16952 Datasheet

2.2MHz Step-Down Controller

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MAX16952
EVALUATION KIT AVAILABLE
36V, 2.2MHz Step-Down Controller
with Low Operating Current
General Description
The MAX16952 is a current-mode, synchronous PWM
step-down controller designed to operate with input volt-
ages from 3.5V to 36V while using only 50μA of quies-
cent current at no load. The switching frequency is
adjustable from 1MHz to 2.2MHz by an external resistor
and can be synchronized to an external clock up to
2.4MHz. The MAX16952 output voltage is pin program-
mable to be either 5V fixed, or adjustable from 1V to 10V.
The wide input voltage range, along with its ability to
operate in dropout during undervoltage transients,
makes it ideal for automotive and industrial applications.
The MAX16952 operates in fixed-frequency PWM mode
and low quiescent current skip mode. It features an
enable logic input, which is compatible up to 42V to dis-
able the device and reduce its shutdown current to
10μA. Protection features include overcurrent limit, over-
voltage, undervoltage, and thermal shutdown with auto-
matic recovery. The device also features a power-good
monitor to ease power-supply sequencing.
The MAX16952 is available in a thermally enhanced
16-pin TSSOP package with an exposed pad, and is
specified for operation over the -40°C to +125°C automo-
tive temperature range.
Applications
Automotive
Industrial
Military
Point of Load
Typical Operating Circuit
VBAT
CIN
RCOMP CCOMP2
CCOMP1
SUP
COMP
DH
BST
LX
MAX16952
CBST
NH
L
RFOSC
PGOOD
EN
FSYNC
FOSC
SGND
DL
PGND
CS
OUT
FB
BIAS
NL RSENSE
COUT
VOUT
5V
CL
Benefits and Features
Meets Stringent Automotive Quality and Reliability
Requirements
+3.5V to +36V Input Voltage Range Allows
Operation in “Cold Crank” Conditions
High Duty Cycle During Undervoltage Transients
Tolerates Input-Voltage Transients to +42V
Enable-Pin Compatible from +3.3V Logic Level
to +42V
Current-Limit, Thermal Shutdown, and Overvoltage
Protection
-40°C to +125°C Automotive Temperature Range
AEC-Q100 Qualified
Increased Efficiency and Reduced BOM Cost and
Board Space
Lowest BOM Count for Current-Mode-Control
Architecture
16-Pin TSSOP-EP Packages
Low Quiescent Current Helps Designers Meet
Stringent OEM Current Requirements
50μA Quiescent Current During Skip Mode
Operation
High Switching Frequency Allows Use of Small,
Low-Cost External Components
1MHz to 2.2MHz Adjustable Switching Frequency
2.1MHz Switching Frequency with Three Modes of
Operation
Skip Mode for Efficient, Low-Power Operation
Forced Fixed-Frequency Operation
External Frequency Synchronization
Adjustable Output Voltage Supports a Diverse Range
of Applications
1V to 10V Output Voltage with ±2% Accuracy
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX16952AUE+ -40°C to +125°C 16 TSSOP-EP*
MAX16952AUE/V+ -40°C to +125°C 16 TSSOP-EP*
/V denotes an automotive qualified part.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
19-5789; Rev 7; 3/16


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX16952 Datasheet

2.2MHz Step-Down Controller

No Preview Available !

MAX16952
36V, 2.2MHz Step-Down Controller
with Low Operating Current
Absolute Maximum Ratings
SUP and EN to SGND ............................................-0.3V to +42V
LX to PGND (Note 1) .................................................-1V to +42V
BST to LX (Note 1)....................................................-0.3V to +6V
BIAS, FB, PGOOD, FSYNC to SGND .......................-0.3V to +6V
DH to LX (Note 1) .....................................................-0.3V to +6V
DL to PGND (Note 1) ...............................-0.3V to (VBIAS + 0.3V)
FOSC to SGND ........................................-0.3V to (VBIAS + 0.3V)
CS and OUT to SGND ............................................-0.3V to +11V
PGND to SGND .....................................................-0.3V to +0.3V
Continuous Power Dissipation (TA = +70°C)
TSSOP (derate 26.1mW/°C above +70°C).......................2088.8mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°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.
Package Thermal Characteristics (Note 2)
TSSOP
Junction-to-Ambient Thermal Resistance (θJA) .........38.3°C/W
Junction-to-Case Thermal Resistance (θJC) ...................3°C/W
Note 1: Self-protected against transient voltages exceeding these limits for 50ns under normal operation and loads up to the
maximum rated output current.
Note 2: 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
(VSUP = VEN = 14V, CIN = 10μF, COUT = 94μF, CBIAS = 2.2μF, CBST = 0.1μF, RFOSC = 14.3kΩ, TA = TJ = -40°C to +125°C, unless
otherwise noted. Typical values are at TA = +25°C.) (Note 3)
PARAMETER
SUP Input Voltage Range
SUP Operating Supply Current
Skip Mode Supply Current
SUP Shutdown Supply Current
BIAS Voltage
BIAS Undervoltage Lockout
BIAS Undervoltage Lockout
Hysteresis
SYMBOL
VSUP
ISUP
ISKIP
ISHDN,SUP
VBIAS
VUVBIAS
CONDITIONS
(Note 4)
Fixed 5V output, fixed-frequency, PWM
mode, VFB = VBIAS, no external FETs
connected
No load, fixed 5V output
VEN = 0V
VSUP = 3.5V, IBIAS = 45mA
6V < VSUP < 36V
VBIAS rising
VBIAS falling
MIN TYP MAX UNITS
3.5 36 V
1 mA
50 90
10 20
3.0
4.7 5.0 5.3
3.1 3.4
200
μA
μA
V
V
mV
BIAS Minimum Load
OUTPUT VOLTAGE (OUT)
IBIAS(MIN) VSUP - VBIAS > 200mV
45 mA
Output Voltage Adjustable
Range
1.0 10 V
OUT Pulldown Resistance
Output Voltage (5V Fixed Mode)
RPULL_D
VOUT
VEN = 0V or fault condition active
VSUP = 6V to 36V, VFB = VBIAS,
fixed-frequency mode (Note 5)
30
4.925 5.0 5.075
V
FB Feedback Voltage
(Adjustable Mode)
FB Current
FB Line Regulation
VFB
VSUP = 6V to 36V, 0V < (VCS - VOUT) < 80mV,
fixed-frequency mode
0.99
1.0
1.01
V
IFB VFB = 1.0V
VEN = VSUP, 6V < VSUP < 36V (Note 5)
0.02 μA
0.02 %/V
www.maximintegrated.com
Maxim Integrated | 2


Part Number MAX16952
Description 2.2MHz Step-Down Controller
Maker Maxim Integrated
PDF Download

MAX16952 Datasheet PDF






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