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MAX5069DAUE+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19
General Description
The MAX5069 is a high-frequency, current-mode,
pulse-width modulation (PWM) controller (with dual
MOSFET drivers) that integrates all the building blocks
necessary for implementing AC-DC or DC-DC fixed-fre-
quency power supplies. Isolated or nonisolated push-
pull and half/full-bridge power supplies are easily
constructed using either primary- or secondary-side
regulation. Current-mode control with leading-edge
blanking simplifies control-loop design and a program-
mable internal slope-compensation circuit stabilizes the
current loop when operating at duty cycles above 50%.
An input undervoltage lockout (UVLO) programs the
input-supply startup voltage and ensures proper opera-
tion during brownout conditions.
A single external resistor programs the oscillator frequen-
cy from 50kHz to 2.5MHz. The MAX5069A/D provide a
SYNC input for synchronization to an external clock. The
maximum FET-driver duty cycle for the MAX5069 is 50%.
Programmable dead time allows additional flexibility in
optimizing magnetic design and overcoming parasitic
effects. Programmable hiccup current limit provides
additional protection under severe faults.
The MAX5069 is specified over the -40°C to +125°C auto-
motive temperature range and is available in a
16-pin thermally enhanced TSSOP-EP package. Refer to
the MAX5068 data sheet for single FET-driver applications.
Warning: The MAX5069 is designed to work with high
voltages. Exercise caution.
Applications
Universal-Input AC Power Supplies
Isolated Telecom Power Supplies
Networking System Power Supplies
Server Power Supplies
Industrial Power Conversion
Features
♦ Current-Mode Control with 47µA (typ) Startup
Current
♦ Oscillator Frequency Programmable to 2.5MHz
♦ Resistor-Programmable ±4.5% Accurate
Switching Frequency
♦ Dual Gate-Drive Output for Half/Full-Bridge or
Push-Pull Applications
♦ Rectified 85VAC to 265VAC, or 36VDC to 72VDC
Input (MAX5069A/B)
♦ Input Directly Driven from 10.8V to 24V
(MAX5069C/D)
♦ Programmable Dead Time and Slope
Compensation
♦ Programmable Startup Voltage (UVLO)
♦ Programmable UVLO Hysteresis (MAX5069B/C)
♦ Frequency Synchronization Input (MAX5069A/D)
♦ -40°C to +125°C Automotive Temperature Range
♦ 16-Pin Thermally Enhanced TSSOP-EP Package
MAX5069
High-Frequency, Current-Mode PWM Controller
with Accurate Oscillator and Dual FET Drivers
________________________________________________________________ Maxim Integrated Products 1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
RT
REG5
IN
V
CC
NDRVA
NDRVB
PGND
AGND
CS
TOP VIEW
MAX5069
TSSOP-EP
SYNC(HYST*)
SCOMP
FB
DT
UVLO/EN
COMP
FLTINT
*MAX5069B/C.
Pin Configuration
Ordering Information
19-3175; Rev 1; 7/04
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.
*EP = Exposed pad.
PART TEMP RANGE PIN-PACKAGE
MAX5069AAUE
-40°C to +125°C
16 TSSOP-EP*
MAX5069BAUE
-40°C to +125°C
16 TSSOP-EP*
MAX5069CAUE
-40°C to +125°C
16 TSSOP-EP*
MAX5069DAUE
-40°C to +125°C
16 TSSOP-EP*
Selector Guide appears at end of data sheet.
MAX5069
High-Frequency, Current-Mode PWM Controller
with Accurate Oscillator and Dual FET Drivers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= +12V for the MAX5069C/D, V
IN
= +23.6V for the MAX5069A/B at startup, then reduces to +12V, C
IN
= C
REG5
= 0.1µF,
C
VCC
= 1µF, R
RT
= 100kΩ, NDRV_ = floating, T
A
= T
MIN
to T
MAX
, 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 PGND ............................................................-0.3V to +30V
IN to AGND.............................................................-0.3V to +30V
V
CC
to PGND..........................................................-0.3V to +13V
V
CC
to AGND..........................................................-0.3V to +13V
FB, COMP, CS, HYST, SYNC, REG5 to AGND ........-0.3V to +6V
UVLO/EN, RT, DT, SCOMP, FLTINT to AGND .........-0.3V to +6V
NDRVA, NDRVB to PGND..........................-0.3V to (V
CC
+ 0.3V)
AGND to PGND.....................................................-0.3V to +0.3V
Continuous Power Dissipation (T
A
= +70°C)
16-Pin TSSOP-EP (derate 21.3mW/°C above +70°C)...1702mW
Operating Temperature Range..........................-40°C to +125°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range.............................-60°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
UNDERVOLTAGE LOCKOUT/STARTUP
Bootstrap UVLO Wake-Up Level
V
SUVR
V
IN
rising, MAX5069A/B
19.68 21.6 23.60
V
Bootstrap UVLO Shutdown Level
V
SUVF
V
IN
falling, MAX5069A/B
9.05 9.74 10.43
V
UVLO/EN Wake-Up Threshold V
ULR2
UVLO/EN rising
1.205 1.230 1.255
V
UVLO/EN Shutdown Threshold V
ULF2
UVLO/EN falling
1.18
V
HYST FET On-Resistance
R
D S
(
ON
)
_H
MAX5069B/C only, sinking 50mA,
V
UVLO/EN
= 0V
10
Ω
HYST FET Leakage Current I
LEAK_H
V
UVLO/EN
= 2V, V
HYST
= 5V 3 nA
IN Supply Current In
Undervoltage Lockout
I
START
V
IN
= +19V, V
UVLO/EN
< V
ULF2
47
90 µA
IN Range V
IN
10.8 24.0
V
INTERNAL SUPPLIES (V
CC
and REG5)
V
CC
Regulator Set Point V
CCSP
V
IN
= + 10.8V to + 24V , V
C C
sour ci ng 1µA to 25m A 7.0 10.5
V
REG5 Output Voltage V
REG5
I
REG5
= 0 to 1mA
4.85 5.00 5.15
V
REG5 Short-Circuit Current Limit
I
REG5_SC
18
mA
f
SW
= 1.25MHz 7
IN Supply Current After Startup I
IN
V
IN
= +24V
f
SW
= 100kHz 3
mA
Shutdown Supply Current I
VIN_SD
90 µA
GATE DRIVER (NDRVA, NDRVB)
Z
OUT
(
LOW
)
NDRVA/NDRVB sinking 100mA 2 4
Driver Output Impedance
Z
OUT
(
HIGH
)
NDRVA/NDRVB sourcing 25mA 3 6
Ω
Sinking
1000
Driver Peak Output Current I
NDRV
Sourcing
650
mA
PWM COMPARATOR
Comparator Offset Voltage
V
OS_PWM
V
COMP
> V
CS
1.30 1.60 2.00
V
Comparator Propagation Delay
t
PD_PWM
V
CS
= 0.1V
40
ns
Minimum On-Time
t
ON
(
MIN
)
Includes t
CS_BLANK
110
ns
CURRENT-LIMIT COMPARATOR
Current-Limit Trip Threshold V
CS
298 314 330
mV
MAX5069
High-Frequency, Current-Mode PWM Controller
with Accurate Oscillator and Dual FET Drivers
_______________________________________________________________________________________ 3
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
CS Input Bias Current I
B_CL
V
CS
= 0V 0
+2
µA
CS Blanking Time
t
CS_BLANK
70
ns
Propagation Delay from
Comparator Input to NDRV_
t
PD_CL
50mV overdrive
40
ns
IN CLAMP VOLTAGE
IN Clamp Voltage
V
IN_CLAMP
IN sinking 2mA (Note 2)
24.0 26.0 29.0
V
ERROR AMPLIFIER (FB, COMP)
Voltage Gain A
V
R
COMP
= 100kΩ to AGND
80
dB
Unity-Gain Bandwidth BW
R
COMP
= 100kΩ to AGND,
C
LOAD
= 100pF to AGND
5
MHz
Phase Margin PM
R
COMP
= 100kΩ to AGND,
C
LOAD
= 100pF to AGND
65
D eg r ees
FB Input Offset Voltage V
OS_FB
3mV
High
2.6 3.8
COMP Clamp Voltage V
COMP
Low
0.4 1.1
V
Error-Amplifier Output Current I
COMP
Sinking or sourcing
0.5
mA
+25°C ≤ T
A
≤ +125°C (Note 3)
1.215 1.230 1.245
Reference Voltage V
REF
-40°C ≤ T
A
≤ +125°C (Note 3)
1.205 1.230 1.242
V
Input Bias Current I
B_EA
100 300
nA
COMP Short-Circuit Current
I
COMP_SC
12
mA
THERMAL SHUTDOWN
Thermal-Shutdown Temperature
T
SD
+170
°C
Thermal Hysteresis T
HYST
25
°C
OSCILLATOR SYNC INPUT (MAX5069A/D only)
SYNC High-Level Voltage
V
IH_SYNC
2.4
V
SYNC Low-Level Voltage
V
IL_SYNC
0.4
V
SYNC Input Bias Current
I
B_SYNC
10
nA
Maximum SYNC Frequency f
SYNC
f
OSC
= 2.5MHz (Note 4)
3.125
MHz
SYNC High-Level Pulse Width
t
SYNC_HI
30
ns
SYNC Low-Level Pulse Width
t
SYNC_LO
30
ns
DIGITAL SOFT-START
Soft-Start Duration t
SS
(Note 5)
2047
Cycles
Reference-Voltage Step V
STEP
9.7
mV
Reference-Voltage Steps During
Soft-Start
127
Steps
OSCILLATOR
Oscillator Frequency Range f
OSC
f
OSC
= (10
11
/ R
RT
)
50 2500
kHz
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +12V for the MAX5069C/D, V
IN
= +23.6V for the MAX5069A/B at startup, then reduces to +12V, C
IN
= C
REG5
= 0.1µF,
C
VCC
= 1µF, R
RT
= 100kΩ, NDRV_ = floating, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19

MAX5069DAUE+

Mfr. #:
Buy MAX5069DAUE+
Manufacturer:
Maxim Integrated
Description:
Switching Controllers High-Frequency Current-Mode PWM
Lifecycle:
New from this manufacturer.
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