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MAX15001AEUB+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
General Description
The MAX15000/MAX15001 current-mode PWM con-
trollers contain all the control circuitry required for the
design of wide-input-voltage isolated and nonisolated
power supplies. The MAX15000 is well suited for uni-
versal input (rectified 85VAC to 265VAC) or telecom
(-36VDC to -72VDC) power supplies. The MAX15001
is well suited for low input voltage (9.5VDC to 24VDC)
power supplies.
The MAX15000/MAX15001 contain an internal error
amplifier that regulates the tertiary winding output volt-
age which is used in primary-side-regulated isolated
power supplies. Primary-side regulation eliminates the
need for an optocoupler. An input undervoltage lockout
(UVLO) is provided for programming the input-supply
start voltage and to ensure proper operation during
brownout conditions. An open-drain UVLO flag output,
with 210µs internal delay, allows the sequencing of a
secondary-side controller. The input-supply start volt-
age is externally programmable with a voltage-divider.
A UVLO/EN input is used to shutdown the MAX15000/
MAX15001. Internal digital soft-start eliminates output
voltage overshoot.
The MAX15000 has an internal bootstrap UVLO with
large hysteresis that requires a minimum 23.6V for start-
up. The MAX15001 does not have the internal bootstrap
UVLO and can be biased directly from a minimum volt-
age of 9.5V.
The switching frequency for the MAX15000/MAX15001 is
programmable with an external resistor. The MAX15000A/
MAX15001A provide a 50% maximum duty-cycle limit,
while the MAX15000B/MAX15001B provide a 75% maxi-
mum duty-cycle limit. These devices are available in 10-
pin µMAX
®
packages and are rated for operation over the
-40°C to +85°C temperature range.
Applications
1/2, 1/4, and 1/8th Brick Power Modules
High-Efficiency, Isolated Telecom Power
Supplies
Networking/Servers
Isolated Keep-Alive Power Supplies
12V Boost and SEPIC Regulators
Isolated and Nonisolated High-Brightness LED
Power Supplies
Industrial Power Conversion
Features
♦ Current-Mode Control
♦ Programmable Switching Frequency Up to 625kHz
♦ Accurate UVLO Threshold (1%)
♦ Open-Drain UVLO Flag Output with Internal Delay
♦ 36V to 72V Telecom Voltage Range
♦ Universal Offline Input Voltage Range
Rectified 85VAC to 265VAC (MAX15000)
♦ 9.5V to 24V Input (MAX15001)
♦ Digital Soft-Start
♦ Internal Bootstrap UVLO with Large Hysteresis
(MAX15000)
♦ Internal Error Amplifier with 1.5% Accurate
Reference
♦ 50µA (typ) Startup Supply Current
♦ 50% Maximum Duty-Cycle Limit
(MAX15000A/MAX15001A)
♦ 75% Maximum Duty-Cycle Limit
(MAX15000B/MAX15001B)
♦ 60ns Cycle-by-Cycle Current-Limit Propagation
Delay
♦ Available in Tiny 10-Pin µMAX Packages
MAX15000/MAX15001
Current-Mode PWM Controllers with
Programmable Switching Frequency
________________________________________________________________ Maxim Integrated Products 1
1
2
3
4
5
10
9
8
7
6
IN
V
CC
NDRV
GNDCOMP
FB
UFLG
UVLO/EN
MAX15000
MAX15001
µMAX
TOP VIEW
RTCS
Pin Configuration
Ordering Information
19-3957; Rev 0; 1/06
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.
Warning: The MAX15000/MAX15001 are designed to work with
high voltages. Exercise caution.
+Denotes lead-free package.
EVALUATION KIT
AVAILABLE
Selector Guide appears at end of data sheet.
PART TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX15000AEUB+ -40°C to +85°C 10 µMAX U10-2
MAX15000BEUB+ -40°C to +85°C 10 µMAX U10-2
MAX15001AEUB+ -40°C to +85°C 10 µMAX U10-2
MAX15001BEUB+ -40°C to +85°C 10 µMAX U10-2
µMAX is a registered trademark of Maxim Integrated Products, Inc.
MAX15000/MAX15001
Current-Mode PWM Controllers with
Programmable Switching Frequency
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= +12V (for MAX15000, bring V
IN
up to 23.6V for startup), 10nF bypass capacitors at IN and V
CC
, R12 = 15kΩ (MAX1500_A), R12
= 7.5kΩ (MAX1500_B), R15 = 1kΩ, C6 = 100nF (see the Typical Application Circuit), NDRV = open, V
UVLO/EN
= +1.4V, V
FB
= +1.0V,
COMP = open, V
CS
= 0V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
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 GND ...............................................................-0.3V to +30V
IN Clamp (Internal Shunt) Current ........................................5mA
V
CC
to GND............................................................-0.3V to +13V
FB, COMP, UVLO/EN, RT, CS to GND .....................-0.3V to +6V
UFLG to GND .........................................................-0.3V to +30V
NDRV to GND ............................................-0.3V to (V
CC
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
10-Pin µMAX (derate 5.6mW/°C above +70°C) ........444.4mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range ............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
UVLO/STARTUP
Bootstrap UVLO Wake-Up Level V
SUVR
V
IN
rising (MAX15000 only) 19.68 21.6 23.60 V
Bootstrap UVLO Shutdown Level V
SUVF
V
IN
falling (MAX15000 only) 9.05 9.74 10.43 V
UVLO/EN Wake-Up Threshold V
ULR2
UVLO/EN rising 1.218 1.23 1.242 V
UVLO/EN Shutdown Threshold V
ULF2
UVLO/EN falling 1.14 1.17 1.20 V
UVLO/EN Input Current I
UVLO
V
UVLO/EN
≤ 2V -50 +50 nA
UVLO/EN Hysteresis 60 mV
IN Supply Current In UVLO I
START
V
IN
= 19V, MAX15000 only when in
bootstrap UVLO
50 90 µA
IN Input Voltage Range V
IN
MAX15001 only 9.5 24.0 V
UVLO/EN steps up from 1V to 1.4V 3
UVLO/EN to UFLG Propagation
Delay (Figure 3)
UVLO/EN steps down from 1.4V to 1V 0.6
µs
t
EXTR
UVLO/EN steps up from 1V to 1.4V 3 10 ms
UVLO/EN to NDRV Propagation
Delay (Figure 3)
t
EXTF
UVLO/EN steps down from 1.4V to 1V 150 210 300 µs
t
BUVR
V
IN
steps up from 9V to 24V (MAX15000
only)
5
Bootstrap UVLO Propagation
Delay
t
BUVF
V
IN
steps down from 24V to 9V
(MAX15000 only)
1
µs
UFLG Low Output Voltage V
UFLG
I
UFLG
= 5mA sinking 0.8 V
UFLG High Output Leakage
Current
V
UFLG
= 25V 0.1 1 µA
INTERNAL SUPPLY
V
CC
Regulator Set Point V
CCSP
V
IN
= 10.8V to 24V, sinking 1µA to 20mA
from V
CC
7.0 10.5 V
IN Supply Current After Startup I
IN
V
IN
= 24V 2 4 mA
Shutdown Supply Current UVLO/EN = low 50 90 µA
MAX15000/MAX15001
Current-Mode PWM Controllers with
Programmable Switching Frequency
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +12V (for MAX15000, bring V
IN
up to 23.6V for startup), 10nF bypass capacitors at IN and V
CC
, R12 = 15kΩ (MAX1500_A), R12
= 7.5kΩ (MAX1500_B), R15 = 1kΩ, C6 = 100nF (see the Typical Application Circuit), NDRV = open, V
UVLO/EN
= +1.4V, V
FB
= +1.0V,
COMP = open, V
CS
= 0V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
GATE DRIVER
R
ON
(
LOW
)
Measured at NDRV sinking 100mA 2 4
Driver Output Impedance
R
ON
(
HIGH
)
Measured at NDRV sourcing 20mA 4 10
Ω
Driver Peak Sink Current 1A
Driver Peak Source Current 0.65 A
PWM COMPARATOR
Comparator Offset Voltage V
PWM
V
COMP
- V
CS
1.24 1.38 1.54 V
CS Input Bias Current I
CS
V
CS
= 0V -4 +4 µA
Comparator Propagation Delay t
PWM
Change in V
CS
= 0.1V 60 ns
CURRENT-LIMIT COMPARATOR
Current-Limit Trip Threshold V
CS
900 1000 1100 mV
CS Input Bias Current I
CS
V
CS
= 0V -4 +4 µA
Propagation Delay From
Comparator Input to NDRV
t
PDCS
100mV overdrive 60 ns
IN CLAMP VOLTAGE
IN Clamp Voltage V
INC
2mA sink current (Note 2) 24.1 26.1 29.0 V
ERROR AMPLIFIER
Voltage Gain R
LOAD
= 100kΩ 80 dB
Unity-Gain Bandwidth R
LOAD
= 100kΩ, C
LOAD
= 200pF 2 MHz
Phase Margin R
LOAD
= 100kΩ, C
LOAD
= 200pF 65 degrees
FB Input Offset Voltage ±1 mV
COMP High Voltage I
COMP
= 0 2.8
COMP Low Voltage I
COMP
= 0 1.1
V
Source Current 0.5 mA
Sink Current 0.5 mA
Reference Voltage V
REF
(Note 3) 1.230 V
Reference Voltage Accuracy -1.5 +1.5 %
FB Input Bias Current -50 +50 nA
COMP Short-Circuit Current 8mA
DIGITAL SOFT-START
1984
NDRV
cycles
Soft-Start Duration t
SS
f
SW
= 350kHz 5.6 ms
Reference Voltage Steps During
Soft-Start
31 steps
Reference Voltage Step 39.67 mV
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

MAX15001AEUB+

Mfr. #:
Buy MAX15001AEUB+
Manufacturer:
Maxim Integrated
Description:
Switching Controllers w/Programmable Switching Frequency
Lifecycle:
New from this manufacturer.
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