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Datasheet> All Categories > Power/power management> The power supply circuit> MAX1636EAP-T
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MAX1636EAP-T

Description
1A SWITCHING CONTROLLER, 330kHz SWITCHING FREQ-MAX, PDSO20, 5.30 MM, MO-150, SSOP-20
CategoryPower/power management    The power supply circuit   
File Size930KB，24 Pages
ManufacturerRochester Electronics
Websitehttps://www.rocelec.com/
Environmental Compliance  
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MAX1636EAP-T Overview

1A SWITCHING CONTROLLER, 330kHz SWITCHING FREQ-MAX, PDSO20, 5.30 MM, MO-150, SSOP-20

MAX1636EAP-T Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
MakerRochester Electronics
Parts packaging codeSSOP
package instruction5.30 MM, MO-150, SSOP-20
Contacts20
Reach Compliance Codeunknown
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage5.5 V
Minimum input voltage3.15 V
Nominal input voltage3.3 V
JESD-30 codeR-PDSO-G20
JESD-609 codee0
length7.2 mm
Humidity sensitivity level1
Number of functions1
Number of terminals20
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Maximum output current1 A
Package body materialPLASTIC/EPOXY
encapsulated codeSSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)245
Certification statusCOMMERCIAL
Maximum seat height1.99 mm
surface mountYES
Switch configurationPUSH-PULL
Maximum switching frequency330 kHz
technologyBICMOS
Temperature levelINDUSTRIAL
Terminal surfaceTIN LEAD
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width5.29 mm

MAX1636EAP-T Preview

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19-1268; Rev 3; 8/05
KIT
ATION
EVALU
BLE
AVAILA
Low-Voltage, Precision Step-Down
Controller for Portable CPU Power
Features
♦
±1% DC Accuracy (Adjustable Mode)
♦
Output Overvoltage Crowbar Protection
♦
Output Undervoltage Shutdown
♦
Adjustable Switching Frequency to 340kHz
♦
Low-Dropout Operation
♦
Idle Mode Pulse-Skipping Operation
♦
1.10V to 5.5V Adjustable Output Voltage
♦
2.5V/3.3V Dual-Mode Fixed-Output Settings
♦
Internal Digital Soft-Start
♦
1.1V ±1% Reference Output
♦
3μA (typ) Shutdown Current
♦
Open-Drain Power-Good Output (RESET)
♦
20-Pin SSOP Package
General Description
The MAX1636 is a synchronous, buck, switch-mode,
power-supply controller that generates the CPU supply
voltage in battery-powered systems. It achieves ±1%
output voltage accuracy and offers the excellent load-
transient response needed by upcoming generations of
dynamic-clock CPUs.
Up to 95% efficiency is achieved through synchronous
rectification and Maxim’s proprietary Idle Mode™ con-
trol scheme. Efficiency is greater than 80% over a
1000:1 load-current range, extending battery life in sys-
tem-suspend or standby modes. Excellent dynamic
response corrects output load transients caused by the
latest dynamic-clock CPUs within five 300kHz clock
cycles. Strong, 1A, on-board gate drivers ensure fast,
external N-channel MOSFET switching.
The MAX1636 features a logic-controlled and synchro-
nizable, fixed-frequency, pulse-width-modulation (PWM)
operating mode that reduces noise and RF interference
in sensitive mobile communications and pen-entry appli-
cations. Holding
SKIP
high forces fixed-frequency mode
for lowest noise under all load conditions.
For a low-cost version that omits the +5V VL linear-
regulator block and comes in a smaller 16-pin QSOP
package, refer to the MAX1637 data sheet.
MAX1636
Ordering Information
PART
MAX1636EAP
MAX1636EAP+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
20 SSOP
20 SSOP
Applications
Notebook Computers
Subnotebook Computers
Desktop Computers
Bus-Termination Supplies
+Denotes
lead-free package.
Typical Operating Circuit
V
IN
V+
SHDN
Pin Configuration
TOP VIEW
CSH 1
CSL 2
RESET 3
SHDN 4
OVP 5
CC 6
REF 7
SYNC 8
GND 9
GND 10
20 SKIP
19 LX
18 DH
17 BST
OVP
VL
V
CC
CC
DH
BST
LX
MAX1636
SKIP
SYNC
MAX1636
16 PGND
15 DL
14 VL
13 V+
12 V
CC
11 FB
DL
PGND
CSH
GND
CSL
FB
RESET
TO
μP
REF
GND
SSOP
Idle Mode is a trademark of Maxim Integrated Products.
________________________________________________________________
Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Low-Voltage, Precision Step-Down
Controller for Portable CPU Power
MAX1636
ABSOLUTE MAXIMUM RATINGS
V+ to GND ...............................................................-0.3V to 36V
GND to PGND........................................................................±2V
SHDN
to GND. ......................................................... -0.3V to 36V
LX, BST to GND. ...................................................... -0.3V to 36V
DH, BST to LX .............................................................-0.3V to 6V
VL, V
CC
, CSL, CSH, FB,
SKIP
to GND ...................... -0.3V to 6V
DL to GND.. ..................................................-0.3V to (VL + 0.3V)
REF,
RESET,
SYNC, CC, OVP to GND. ..... -0.3V to (V
CC
+ 0.3V)
VL Output Current... ............................................................50mA
VL Short Circuit to GND..............................................Momentary
REF Output Current ............................................................20mA
REF Short Circuit to GND ....... ......................................Indefinite
Continuous Power Dissipation (T
A
= +70°C)
SSOP (derate 8.00mW/°C above +70°C) .....................640mW
Operating Temperature Range
MAX1636EAP. ..................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°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.
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V+ = 15V, SYNC = VL = V
CC
, I
VL
= 0mA, I
REF
= 0mA,
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values
are at T
A
= +25°C.)
PARAMETER
SMPS CONTROLLER
Input Voltage Range, V+
Input Voltage Range, VL
Input Voltage Range, V
CC
Output Voltage, Adj Mode
Output Voltage, Fixed 2.5V Mode
Output Voltage, Fixed 3.3V Mode
Output Adjustment Range
Current-Limit Threshold
Power Consumption
Shutdown Supply Current (V+)
FB Input Current
Soft-Start Ramp Time
Idle Mode Switchover Threshold
Input source for VL regulator
Gate-driver supply rail
Internal chip supply rail
FB tied to V
OUT
, 0mV < (CSH - CSL) < 80mV, 4.5V
< V+ < 30V (includes line and load regulation)
FB tied to V
CC
, 0mV < (CSH - CSL) < 80mV, 4.5V
< V+ < 30V (includes line and load regulation)
FB tied to GND, 0mV < (CSH - CSL) < 80mV, 4.5V
< V+ < 30V (includes line and load regulation)
V
CC
= VL = 5V
V
CC
= 3.3V, VL = 5V
Positive direction
Negative direction
V
CC
= 5V, output not switching
V
CC
= 3.3V, output not switching
SHDN
= GND, OVP = GND
FB forced to REF
SHDN
to full current limit, five levels
CSH - CSL
20
-50
512
30
40
3
4.5
4.2
3.15
1.090
2.486
3.282
V
REF
V
REF
80
-145
100
-100
1.100
2.55
3.366
30
5.5
5.5
1.110
2.614
3.450
5.5
3.6
120
-55
2.0
1.5
10
50
V
V
V
V
V
V
V
mV
mV
mW
µA
nA
clks
mV
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
Low-Voltage, Precision Step-Down
Controller for Portable CPU Power
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V+ = 15V, SYNC = VL = V
CC
, I
VL
= 0mA, I
REF
= 0mA,
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values
are at T
A
= +25°C.)
PARAMETER
INTERNAL VL REGULATOR AND REFERENCE
V
CC
= 5V, I(VL) = 0
Regulator Supply Current (V+)
Standby Supply Current (V+)
VL Output Voltage
VL Undervoltage Lockout Threshold
VL/ V
CC
Switchover Threshold
REF Output Voltage
REF Load Regulation
REF Line Regulation
OSCILLATOR
Oscillator Frequency
Maximum Duty Factor
Maximum Duty Factor, Dropout Mode
SYNC Input Pulse Width High
SYNC Input Pulse Width Low
SYNC Input Rise/Fall Time
SYNC Input Frequency Range
OVERVOLTAGE PROTECTION
Overvoltage Trip Threshold
Overvoltage Fault Propagation Delay
Thermal Shutdown Threshold
Catastrophic Output Undervoltage
Lockout Threshold
Catastrophic Output Undervoltage
Lockout Delay
RESET
Trip Threshold
RESET
Delay Time
INPUTS AND OUTPUTS
Logic Input Voltage High
Logic Input Voltage Low
Logic Input Bias Current
SHDN
Input Bias Current
RESET
Output Voltage Low
RESET
Output Leakage Current
SHDN, SKIP,
OVP, SYNC
SHDN, SKIP,
OVP, SYNC
Pin at GND or V
CC
;
SKIP,
OVP, SYNC
SHDN
= GND or V+
I
SINK
= 4mA
+5.5V stress voltage applied
-1
-3
2.4
0.8
1
3
0.4
V
V
µA
µA
V
µA
FB, with respect to regulation point
FB to DL delay, 22mV overdrive, C
GATE
= 2000pF
Hysteresis = 10°C
% of nominal output
From shutdown or power-on-reset state
Falling edge (hysteresis = 1%)
-6
32768
60
4
7
1.25
150
70
6144
-3
80
10
%
µs
°C
%
clks
%
clks
Guaranteed by design
240
SYNC = V
CC
SYNC = GND
SYNC = V
CC
SYNC = GND
SYNC = GND
270
170
91
93
98
200
200
200
340
300
200
94
96
99
330
230
kHz
%
%
ns
ns
ns
kHz
V
CC
= 5V, I(VL) = 0, V+ = 4.5V
(includes PNP base current)
SHDN
= GND, OVP = V
CC
I(VL) = 0 to 25mA, 5V < V+ < 30V
I(VL) = 0 to 25mA, 6V < V+ < 30V
Rising edge, hysteresis = 25mV
Rising edge, hysteresis = 25mV
No REF load
REF load = 0 to 50µA
V
CC
= 3.3V to 5.5V
1.090
4.5
4.7
3.45
5.0
5.0
3.60
3.15
1.100
1.110
10
3
60
500
60
5.3
5.3
3.75
µA
µA
V
V
V
V
mV
mV
CONDITIONS
MIN
TYP
MAX
UNITS
MAX1636
1
_______________________________________________________________________________________
3
Low-Voltage, Precision Step-Down
Controller for Portable CPU Power
MAX1636
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V+ = 15V, SYNC = VL = V
CC
, I
VL
= 0mA, I
REF
= 0mA,
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values
are at T
A
= +25°C.)
PARAMETER
Current-Sense Input
Leakage Current
Gate-Driver Sink/Source Current
Gate-Driver On-Resistance
CONDITIONS
CSH = CSL = 5V, V+ = VL = V
CC
=
GND, either CSH or CSL input
DH or DL forced to 2V
High or low, DH or DL
1
7
MIN
TYP
MAX
10
UNITS
µA
A
Ω
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V+ = 15V, SYNC = VL = V
CC
, I
VL
= 0mA, I
REF
= 0mA,
T
A
=-40°C to +85°C,
unless otherwise noted.) (Note 1)
PARAMETER
SMPS CONTROLLER
Input Voltage Range, V+
Input Voltage Range, VL
Input Voltage Range, V
CC
Output Voltage, Adj Mode
Output Voltage, Fixed 2.5V Mode
Output Voltage, Fixed 3.3V Mode
Output Adjustment Range
Current-Limit Threshold
Power Consumption
Input source for VL regulator
Gate-driver supply rail
Internal chip supply rail
FB tied to V
OUT
, 0mV < (CSH - CSL) < 80mV, 4.5V
< V+ < 30V (includes line and load regulation)
FB tied to V
CC
, 0mV < (CSH - CSL) < 80mV, 4.5V
< V+ < 30V (includes line and load regulation)
FB tied to GND, 0mV < (CSH - CSL) < 80mV, 4.5V
< V+ < 30V (includes line and load regulation)
V
CC
= VL = 5V
V
CC
= 3.3V, VL = 5V
Positive direction
V
CC
= 5V, output not switching
V
CC
= 3.3V, output not switching
V
CC
= 5V, I(VL) = 0
Regulator Supply Current (V+)
Standby Supply Current (V+)
VL Output Voltage
VL Undervoltage Lockout
Threshold
V
CC
= 5V, I(VL) = 0, V+ = 4.5V
(includes PNP base current)
SHDN
= GND, OVP = V
CC
I(VL) = 0 to 25mA, 5V < V+ < 30V
I(VL) = 0 to 25mA, 6V < V+ < 30V
Rising edge, hysteresis = 25mV
4.5
4.7
3.45
4.5
4.2
3.15
1.086
2.432
3.195
V
REF
V
REF
70
30
5.5
5.5
1.114
2.635
3.497
5.5
3.6
130
2.0
1.5
60
500
60
5.3
5.3
3.91
µA
µA
V
V
V
V
V
V
V
V
V
mV
mW
CONDITIONS
MIN
TYP
MAX
UNITS
INTERNAL VL REGULATOR AND REFERENCE
4
_______________________________________________________________________________________
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MAX1636EAP-T Related Products

MAX1636EAP-T MAX1636EAP MAX1636EAP+
Description 1A SWITCHING CONTROLLER, 330kHz SWITCHING FREQ-MAX, PDSO20, 5.30 MM, MO-150, SSOP-20 1A SWITCHING CONTROLLER, 330kHz SWITCHING FREQ-MAX, PDSO20, 5.30 MM, MO-150, SSOP-20 1A SWITCHING CONTROLLER, 330kHz SWITCHING FREQ-MAX, PDSO20, 5.30 MM, LEAD FREE, MO-150, SSOP-20
Is it lead-free? Lead free Lead free Contains lead
Maker Rochester Electronics Rochester Electronics Rochester Electronics
Parts packaging code SSOP SSOP SSOP
package instruction 5.30 MM, MO-150, SSOP-20 5.30 MM, MO-150, SSOP-20 5.30 MM, LEAD FREE, MO-150, SSOP-20
Contacts 20 20 20
Reach Compliance Code unknown unknown unknown
Analog Integrated Circuits - Other Types SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER
control mode CURRENT-MODE CURRENT-MODE CURRENT-MODE
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum input voltage 5.5 V 5.5 V 5.5 V
Minimum input voltage 3.15 V 3.15 V 3.15 V
Nominal input voltage 3.3 V 3.3 V 3.3 V
JESD-30 code R-PDSO-G20 R-PDSO-G20 R-PDSO-G20
JESD-609 code e0 e0 e3
length 7.2 mm 7.2 mm 7.2 mm
Humidity sensitivity level 1 1 1
Number of functions 1 1 1
Number of terminals 20 20 20
Maximum operating temperature 85 °C 85 °C 85 °C
Minimum operating temperature -40 °C -40 °C -40 °C
Maximum output current 1 A 1 A 1 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SSOP SSOP SSOP
Package shape RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius) 245 245 260
Certification status COMMERCIAL COMMERCIAL COMMERCIAL
Maximum seat height 1.99 mm 1.99 mm 1.99 mm
surface mount YES YES YES
Switch configuration PUSH-PULL PUSH-PULL PUSH-PULL
Maximum switching frequency 330 kHz 330 kHz 330 kHz
technology BICMOS BICMOS BICMOS
Temperature level INDUSTRIAL INDUSTRIAL INDUSTRIAL
Terminal surface TIN LEAD TIN LEAD TIN
Terminal form GULL WING GULL WING GULL WING
Terminal pitch 0.65 mm 0.65 mm 0.65 mm
Terminal location DUAL DUAL DUAL
Maximum time at peak reflow temperature NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
width 5.29 mm 5.29 mm 5.29 mm

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