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MAX8599ETE+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24
MAX8597/MAX8598/MAX8599
Low-Dropout, Wide-Input-Voltage,
Step-Down Controllers
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
V+
= V
VL
= V
AVL
= V
EN
= V
REFIN
= 5V, V
BST
= 6V, V
LX
= 1V, C
VL
= 4.7µF, C
REFOUT
= 1µF, V
AIN-
= V
AOUT
, V
AIN+
= 2.5V, V
ILIM
=
V
LX
- 0.2V, V
FB
= 0.65V, GND = PGND = 0V, C
SS
= 0.01µF, R
FREQ
= 20kΩ, T
A
= 0°C to +85°C, typical values are at T
A
= +25°C,
unless otherwise noted.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
REFIN INPUT (MAX8597 only)
REFIN Input Voltage Range 0 2.75 V
REFIN Dual Mode™ Threshold
V
AVL
-
1.0
V
AVL
-
0.5
V
REFIN Input Bias Current V
REFIN
= 1.25V or 2.5V -250 +250 nA
OV AND UV FAULT COMPARATORS
Upper FB Fault Threshold (OV) Rising edge, hysteresis = 15mV (MAX8599 only) 115 117 120 %
Lower FB Fault Threshold (UV) Falling edge, hysteresis = 15mV 67 70 73 %
POWER-OK OUTPUT (POK) (MAX8598/MAX8599 only)
POK Delay For both FB rising and falling edges 8
Clock
cycles
Lower FB POK Threshold FB falling, hysteresis = 20mV 85 88 90 %
POK Output Low Level I
SINK
= 2mA 0.4 V
POK Output High Leakage V
POK
= 5.5V 5 µA
ELECTRICAL CHARACTERISTICS
(V
V+
= V
VL
= V
AVL
= V
EN
= V
REFIN
= 5V, V
BST
= 6V, V
LX
= 1V, C
VL
= 4.7µF, C
REFOUT
= 1µF, V
AIN-
= V
AOUT
, V
AIN+
= 2.5V, V
ILIM
=
V
LX
- 0.2V, V
FB
= 0.65V, GND = PGND = 0V, C
SS
= 0.01µF, R
FREQ
= 20kΩ, T
A
= -40°C to +85°C, typical values are at T
A
= +25°C,
unless otherwise noted.) (Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
GENERAL
V+ Operating Range 5.5 28.0 V
V+/VL Operating Range V+ = VL 4.5 5.5 V
V+ Operating Supply Current V
V+
= 12V, VL unloaded, no MOSFETs connected, V
FB
= 0V 5.0 mA
VL REGULATOR
Output Voltage 5.5V < V
V+
< 28V, 1mA < I
LOAD
< 35mA 4.7 5.3 V
VL Undervoltage-Lockout Trip
Level
Rising edge, typical hysteresis = 460mV 4.05 4.35 V
REFERENCE (MAX8597 only)
REFOUT Output Voltage I
REFOUT
= 150µA, V
V+
= V
VL
= 4.5V or 5.5V 2.47 2.51 V
REFOUT Load Regulation I
REFOUT
= 10µA to 1mA 10 mV
CURRENT-LIMIT COMPARATOR (all current limits are tested at V
V+
= V
VL
= 4.5V and 5.5V)
ILIM Sink Current V
ILIM
= V
LX
- 0.2V, 1.8V < V
LX
< 28V, V
BST
= V
LX
+ 5V
180 220 µA
Comparator Input Offset Voltage
Error
-10 +10 mV
SOFT-START
Soft-Start Source Current V
SS
= 100mV 3 7 µA
Soft-Start Sink Current V
SS
= (0.6V or V
REFIN
) 3 7 µA
Dual Mode is a trademark of Maxim Integrated Products, Inc.
MAX8597/MAX8598/MAX8599
Low-Dropout, Wide-Input-Voltage,
Step-Down Controllers
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(V
V+
= V
VL
= V
AVL
= V
EN
= V
REFIN
= 5V, V
BST
= 6V, V
LX
= 1V, C
VL
= 4.7µF, C
REFOUT
= 1µF, V
AIN-
= V
AOUT
, V
AIN+
= 2.5V, V
ILIM
=
V
LX
- 0.2V, V
FB
= 0.65V, GND = PGND = 0V, C
SS
= 0.01µF, R
FREQ
= 20kΩ, T
A
= -40°C to +85°C, typical values are at T
A
= +25°C,
unless otherwise noted.) (Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
FREQUENCY
R
FREQ
= 100kΩ 140 240
R
FREQ
= 20.0kΩ 800 1200Frequency
R
FREQ
= 14.3kΩ 1100 1700
kHz
DH Minimum Off-Time 180 230 ns
DH Minimum On-Time 140 ns
FB ERROR AMPLIFIER
FB Input Bias Current 150 nA
FB Input Voltage Set Point Over load and line 0.591 0.606 V
FB Offset Error V
REFIN
= 1.25V and 2.5V, measured with respect to REFIN +20 -20 mV
Error-Amp Open-Loop Voltage
Gain
V
COMP
= 1.2V to 2.4V 72 dB
UNCOMMITTED OPERATIONAL AMPLIFIER (MAX8597 only)
Output Voltage Swing High V
AIN+
= 2.5V, V
AIN
- = (V
AIN+
- 100mV), I
SOURCE
= 100µA
V
AVL
-
20mV
V
Output Voltage Swing Low V
AIN+
= 2.5V, V
AIN
- = (V
AIN+
+ 100mV), I
SINK
= 100µA 20 mV
Input Offset Voltage V
CM
= 1.25V and 2.5V -3 +3 mV
Input Common-Mode Range
(CMVR)
+0.50
V
AVL
-
2.0
V
DRIVERS
DH On-Resistance in Low State V
BST
- V
LX
= 5V 2.5 Ω
DH On-Resistance in High State V
BST
- V
LX
= 5V 3.3 Ω
DL On-Resistance in Low State V
VL
= V
V+
= 5V 1.0 Ω
DL On-Resistance in High State V
VL
= V
V+
= 5V 3.5 Ω
BST Bias Current V
BST
= 33V, V
LX
= 28V, V
EN
= 0V 520 µA
LX Bias Current V
BST
= 33V, V
LX
= 28V, V
EN
= 0V -520 µA
BST/LX Leakage Current V
BST
= V
LX
= 28V, V
EN
= 0V 50 µA
LOGIC INPUTS (EN)
Input Low Level 4.5V < V
VL
= V
V+
= V
AVL
< 5.5V 0.8 V
Input High Level 4.5V < V
VL
= V
V+
= V
AVL
< 5.5V 2.4 V
Input Bias Current V
VL
= V
V+
= V
AVL
= 5.5V, V
EN
= 0 to 5.5V -1 +1 µA
REFIN INPUT (MAX8597 only)
REFIN Input Voltage Range 0 2.75 V
REFIN Dual-Mode Threshold
V
AVL
-
1.0
V
AVL
-
0.5
V
REFIN Input Bias Current V
REFIN
= 1.25V or 2.5V -250 +250 nA
MAX8597/MAX8598/MAX8599
Low-Dropout, Wide-Input-Voltage,
Step-Down Controllers
6 _______________________________________________________________________________________
Note 1: Limits to -40°C are guaranteed by design and characterization.
ELECTRICAL CHARACTERISTICS (continued)
(V
V+
= V
VL
= V
AVL
= V
EN
= V
REFIN
= 5V, V
BST
= 6V, V
LX
= 1V, C
VL
= 4.7µF, C
REFOUT
= 1µF, V
AIN-
= V
AOUT
, V
AIN+
= 2.5V, V
ILIM
=
V
LX
- 0.2V, V
FB
= 0.65V, GND = PGND = 0V, C
SS
= 0.01µF, R
FREQ
= 20kΩ, T
A
= -40°C to +85°C, typical values are at T
A
= +25°C,
unless otherwise noted.) (Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
OV AND UV FAULT COMPARATORS
Upper FB Fault Threshold (OV) Rising edge, hysteresis = 15mV (MAX8599 only) 115 120 %
Lower FB Fault Threshold (UV) Falling edge, hysteresis = 15mV 67 73 %
POWER-OK OUTPUT (POK) (MAX8598/MAX8599 only)
Lower FB POK Threshold FB falling, hysteresis = 20mV 85 90 %
POK Output Low Level I
SINK
= 2mA 0.4 V
POK Output High Leakage V
POK
= 5.5V
5
µA
EFFICIENCY vs. LOAD CURRENT
CIRCUIT OF FIGURE 1
MAX8597 toc01
LOAD CURRENT (A)
EFFICIENCY (%)
1
65
70
75
80
85
90
95
100
60
0.1 10
V
OUT
= 11.5V
V
OUT
= 9V
V
OUT
= 6V
EFFICIENCY vs. LOAD CURRENT
CIRCUIT OF FIGURE 2
MAX8597 toc02
LOAD CURRENT (A)
EFFICIENCY (%)
10
40
50
60
70
80
90
100
30
1100
V
OUT
= 3.3V
V
OUT
= 2.5V
V
OUT
= 1.8V
V
OUT
= 1.2V
OUTPUT VOLTAGE
vs. LOAD CURRENT
MAX8597 toc03
I
LOAD
(A)
OUTPUT VOLTAGE (V)
18161412108642
1.195
1.200
1.205
1.210
1.190
020
OUTPUT VOLTAGE
vs. INPUT VOLTAGE
MAX8597 toc04
V
IN
(V)
OUTPUT VOLTAGE (V)
13.513.012.512.011.511.010.5
1.195
1.200
1.205
1.210
1.190
10.0 14.0
I
LOAD
= 0A
I
LOAD
= 20A
POWER-UP WAVEFORMS
MAX8597 toc05
2ms/div
5V/div
V
AVL
I
LX
V
OUT
V
IN
10A/div
1V/div
10V/div
POWER-DOWN WAVEFORMS
MAX8597 toc06
2ms/div
5V/div
V
AVL
I
LX
I
OUT
V
IN
10A/div
1V/div
10V/div
Typical Operating Characteristics
(Circuit of Figure 4, T
A
= +25°C, 500kHz switching frequency, V
IN
= 12V, unless otherwise noted.)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24

MAX8599ETE+T

Mfr. #:
Buy MAX8599ETE+T
Manufacturer:
Maxim Integrated
Description:
Switching Controllers Step-Down Controller
Lifecycle:
New from this manufacturer.
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