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MAX16922ATPA-V-

Switching Voltage Regulators 2.2MHz Dual Step-Dwn DC/DC Converter

器件类别：半导体    电源管理   

厂商名称：Maxim(美信半导体)

厂商官网：https://www.maximintegrated.com/en.html

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器件参数
参数名称
属性值
Product Attribute
Attribute Value
制造商
Manufacturer
Maxim(美信半导体)
产品种类
Product Category
Switching Voltage Regulators
RoHS
Details
安装风格
Mounting Style
SMD/SMT
封装 / 箱体
Package / Case
TQFN-EP-20
Output Voltage
5 V, 2.7 V, 3.3 V, 1 V
Output Current
450 mA, 600 mA, 1.2 A
Number of Outputs
4 Output
Input Voltage MAX
28 V
Topology
Buck
Input Voltage MIN
3.7 V
Switching Frequency
2.2 MHz
最小工作温度
Minimum Operating Temperature
- 40 C
最大工作温度
Maximum Operating Temperature
+ 125 C
系列
Packaging
Tube
类型
Type
Voltage Converter
Load Regulation
+/- 0.2 %
工厂包装数量
Factory Pack Quantity
60
文档预览
EVALUATION KIT AVAILABLE
MAX16922
2.2MHz, Dual, Step-Down DC-DC
Converters, Dual LDOs, and
RESET
General Description
The MAX16922 power-management integrated circuit
(PMIC) is designed for medium power-level automotive
applications and integrates multiple supplies in a small
footprint. The device includes one high-voltage step-
down converter (OUT1) and three low-voltage cascaded
DC-DC converters (OUT2, OUT3, OUT4). OUT1 and
OUT2 are step-down DC-DC converters, and OUT3/
OUT4 are linear regulators. The device also includes
a reset output (RESET) and a high-voltage-compatible
enable input (EN).
The 1.2A output high-efficiency, step-down DC-DC con-
verter (OUT1) operates from a voltage up to 28V con-
tinuous and is protected from load-dump transients up to
45V. The 600mA output high-efficiency step-down DC-DC
converter (OUT2) runs from a voltage up to 5.5V. The two
300mA LDO linear regulators offer low dropout of only
130mV (typ). The power-good
RESET
output provides
voltage monitoring for OUT1 and OUT2.
OUT1 and OUT2 use fast 2.2MHz PWM switching and
small external components. The high-voltage converter
(OUT1) enters skip mode automatically under light loads
to prevent an overvoltage condition from occurring at the
output. The low-voltage synchronous DC-DC converter
(OUT2) can operate in forced-PWM mode to prevent any
AM band interference or high-efficiency auto-PWM mode.
The MAX16922 includes overtemperature shutdown and
overcurrent limiting. The device is designed to operate
from -40°C to +125°C ambient temperature.
Benefits and Features
●
1.2A High-Efficiency 2.2MHz DC-DC Converter
• 3.7V to 28V Operating Supply Voltage
• 45V Load-Dump Protection
• Output Voltage: 3.0V to 5.5V
●
600mA High-Efficiency 2.2MHz DC-DC Converter
• 2.7V to 5.5V Supply Voltage
• Output Voltage: 1.0V to 3.9V
• 180° Out-of-Phase Operation
• Forced-PWM and Auto-PWM Modes
●
LDO Linear Regulators
• OUT3: 1.0V to 4.15V at 300mA
• OUT4: 1.0V to 4.15V at 300mA
• Separate Inputs for Increased Efficiency
●
Enable Input
●
RESET
Output Monitoring on OUT1 and OUT2
●
Overtemperature and Short-Circuit Protection
●
Available in
5mm x 5mm x 0.8mm, 20-Pin TQFN-EP
4.5mm x 6.5mm, 20-Pin TSSOP-EP
Typical Operating Circuit
V
PV1
4.7µF
V
OUT1
4.7µF
V
OUT3
4.7µF
V
OUT2
4.7µF
V
OUT4
4.7µF
OUT4
GND
GND2
EP
RESET
LSUP
1µF
OUT3
GND1
GND3
PV4
PV1
EN
PWM
PV3
OUTS2
LX2
PGND2
2.2µH
V
OUT2
10µF
MAX16922
PV2
BST
0.1µF
LX1
OUTS1
4.7µH
V
OUT1
10µF
V
OUT1
20kΩ
4.7µF
Ordering Information
appears at end of data sheet.
19-5039; Rev 10; 2/16
MAX16922
2.2MHz, Dual, Step-Down DC-DC
Converters, Dual LDOs, and
RESET
Absolute Maximum Ratings
PV1, EN to GND .....................................................-0.3V to +45V
LX1 to GND.................................................-0.5V to (PV1 + 0.3V)
LX2 to GND.................................................-0.5V to (PV2 + 0.3V)
BST to LX1.............................................................-0.3V to +6.0V
PV2, PV3, PV4, OUTS1, PWM,
RESET
to GND_....-0.3V to +6.0V
OUTS2 .......................................................-0.3V to (PV2 + 0.3V)
OUT3 .........................................................-0.3V to (PV3 + 0.3V)
OUT4 .........................................................-0.3V to (PV4 + 0.3V)
LX1 RMS Current .................................................................2.0A
LX2 RMS Current .................................................................1.2A
PGND2 to GND_....................................................-0.3V to +0.3V
LSUP to GND............................................................-0.3V to +6V
OUTS_, OUT_ Output Short-Circuit Duration .............Continuous
Continuous Power Dissipation (T
A
= +70°C)
TQFN (derate 31.3 mW/°C above +70°C)..................2500mW
TSSOP (derate 26.5 mW/°C above +70°C).................... 2122mW
ESD
HB
(all pins)...................................................................±2kV
ESD
MM
(all pins)................................................................±200V
ESD
CDM
(corner pins).......................................................±750V
ESD
CDM
(other pins).........................................................±500V
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 1)
TQFN
Junction-to-Ambient Thermal Resistance (θ
JA
)...........30°C/W
Junction-to-Case Thermal Resistance (θ
JC
)..................2°C/W
TSSOP
Junction-to-Ambient Thermal Resistance (θ
JA
)........37.7°C/W
Junction-to-Case Thermal Resistance (θ
JC
)..................2°C/W
Note 1:
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
(V
PV1
= 13.5V, V
PV2
= V
PV3
= V
OUT1
, V
PV4
= V
OUT2
; T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C under normal conditions, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
(Note 3)
Operation < 500ms
PV1 rising
PV1 falling
PV1 falling (option enabled)
6V ≤ V
PV1
≤ 28V
EN = low
Internally generated
Duty cycle = 20% to 90%;
I
LOAD
= 300mA to 1.2A
SKIP mode (Note 4)
V
PV1
= 4V, V
BST
= 9V, I
LX1
= 0.2A
1.4
2.0
-3
-2
300
1.75
2.2
4.75
2.85
3.7
3.3
6.45
0.65
V
LSUP
I
PV1
f
SW
V
OUT1
5.0
14
2.2
2.4
+3
+4
700
2.1
mΩ
A
ms
5.45
CONDITIONS
MIN
3.7
TYP
MAX
28
45
4.0
UNITS
OUT1—SYNCHRONOUS STEP-DOWN DC-DC CONVERTER
Supply-Voltage Range
PV1 Undervoltage Lockout
BST Refresh Load Enable
BST Refresh Load Hysteresis
LSUP Regulator Voltage
Supply Current
PWM Switching Frequency
Voltage Accuracy
DMOS On-Resistance
Current-Limit Threshold
Soft-Start Ramp Time
V
PV1
V
UVLO,R
V
UVLO,F
V
BRLE
V
V
V
V
V
µA
MHz
%
www.maximintegrated.com
Maxim Integrated
│
2
MAX16922
2.2MHz, Dual, Step-Down DC-DC
Converters, Dual LDOs, and
RESET
Electrical Characteristics (continued)
(V
PV1
= 13.5V, V
PV2
= V
PV3
= V
OUT1
, V
PV4
= V
OUT2
; T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C under normal conditions, unless otherwise noted.) (Note 2)
PARAMETER
Maximum Output Current
LX1 Leakage Current
Maximum Duty Cycle
Minimum Duty Cycle
OUTS1 Discharge Resistance
DC
MAX
DC
MIN
f
SW
= 2.2MHz
EN = low (or optionally EN = high and
V
PV1
< 5.7V)
V
PV2
f
SW
V
OUT2
Fully operational
Internally generated
Duty cycle = 20% to 90%;
I
LOAD
= 1mA to 600mA, PWM = high
SKIP mode (Note 4)
V
PV2
= 5.0V, I
LX2
= 0.2A
V
PV2
= 5.0V, I
LX2
= 0.2A
0.75
2.7
2.0
-3
-2
150
200
0.9
50
1.5
I
OUT2
V
OUT2
+ 0.5V ≤ V
PV2
≤ 5.5V
V
PV2
= 6V, LX2 = PGND2 or V
PV2
;
T
A
= -40°C to +85°C
Forced-PWM mode only, minimum duty
cycle in skip mode is 0% (Note 4)
V
EN
= 0V
V
PV3
V
OUT3
V
OUT3
+ 0.4V ≤ V
PV3
≤ 5.5V, I
LOAD
= 1mA
I
LOAD
= 0 to 300mA
V
PV3
= 1.8V, I
LOAD
= 250mA (Note 4)
I
OUT3
= 30mA, f = 1kHz
EN = low
V
PV4
V
OUT4
(V
OUT4
+ 0.4V) ≤ V
PV4
≤ 5.5V, I
LOAD
= 1mA
I
LOAD
= 0 to 300mA
V
PV4
= 1.8V, I
LOAD
= 250mA (Note 4)
1.7
-2
-0.2
130
450
320
1.7
-2
-0.2
130
450
57
1
5.5
+2
320
15
70
5.5
+2
600
±1
100
2.2
SYMBOL
I
OUT1
CONDITIONS
(V
OUT1
+ 1.0V) ≤ V
PV1
≤ 28V
V
PV1
= 12V, LX1 = GND or V
PV1
;
T
A
= -40°C to +85°C
MIN
1.2
±1
94
20
70
TYP
MAX
UNITS
A
µA
%
%
Ω
OUT2—SYNCHRONOUS STEP-DOWN DC-DC CONVERTER
Supply-Voltage Range
PWM Switching Frequency
Voltage Accuracy
pMOS On-Resistance
nMOS On-Resistance
pMOS Current-Limit Threshold
nMOS Zero-Crossing Threshold
Soft-Start Ramp Time
Maximum Output Current
LX2 Leakage Current
Duty-Cycle Range
OUTS2 Discharge Resistance
OUT3—LDO REGULATOR
Input Voltage
Voltage Accuracy
Load Regulation
Dropout Voltage
Current Limit
Power-Supply Rejection Ratio
Shutdown Output Resistance
OUT4—LDO REGULATOR
Input Voltage
Voltage Accuracy
Load Regulation
Dropout Voltage
Current Limit
V
%
%
mV
mA
V
%
%
mV
mA
dB
kΩ
5.5
2.4
+3
+4
250
350
1.05
V
MHz
%
%
mΩ
mΩ
A
mA
ms
mA
µA
%
Ω
www.maximintegrated.com
Maxim Integrated
│
3
MAX16922
2.2MHz, Dual, Step-Down DC-DC
Converters, Dual LDOs, and
RESET
Electrical Characteristics (continued)
(V
PV1
= 13.5V, V
PV2
= V
PV3
= V
OUT1
, V
PV4
= V
OUT2
; T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C under normal conditions, unless otherwise noted.) (Note 2)
PARAMETER
Power-Supply Rejection Ratio
Shutdown Output Resistance
THERMAL OVERLOAD
Thermal-Shutdown Temperature
Thermal-Shutdown Hysteresis
RESET
OUT1 OV Threshold
OUT1 Reset Threshold
OUT2 Reset Threshold
Reset option 1 (see the
Selector Guide)
Reset option 2 (see the
Selector Guide)
Percentage of nominal output
Reset timeout option 1 (see the
Selector
Guide)
Reset timeout option 2 (see the
Selector
Guide)
Sinking -3mA
28
EN rising
V
EN
= 5V
PWM rising
PWM falling
0 ≤ V
PWM
≤ 5.5V
1
1.8
0.4
1.4
1.8
0.4
0.5
2.2
85
75
85
(Note 4)
150
175
15
110
90
80
90
14.9
ms
1.9
1
0.4
µA
V
µs
V
V
µA
V
V
µA
95
85
95
°C
°C
%
%
%
SYMBOL
EN = low
CONDITIONS
I
OUT4
= 30mA, f = 1kHz
MIN
TYP
57
1
MAX
UNITS
dB
kΩ
Reset Timeout Period
Output-High Leakage Current
Output Low Level
UV Propagation Time
EN LOGIC INPUT
EN Threshold Voltage
EN Threshold Hysteresis
Input Current
PWM LOGIC INPUT
Input High Level
Input Low Level
Logic-Input Current
Note 2:
All units are 100% production tested at T
A
= +25°C. All temperature limits are guaranteed by design.
Note 3:
Once PVI exceeds undervoltage-lockout rising threshold 4.0V and the device is in regulation.
Note 4:
Guaranteed by design; not product tested.
www.maximintegrated.com
Maxim Integrated
│
4
MAX16922
2.2MHz, Dual, Step-Down DC-DC
Converters, Dual LDOs, and
RESET
Typical Operating Characteristics
(V
PV1
= 13.5V, V
PV2
= V
PV3
= V
OUT1
, V
PV4
= V
OUT2
; T
A
= +25°C, unless otherwise specified.)
MAX16922 toc01
MAX16922 toc02
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
0
PV1 = 18V
PV1 = 13.5V
PV1 = 8V
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
0
PV1 = 13.5V
T
A
= -40°C
90
EFFICIENCY (%)
80
70
60
50
T
A
= +125°C T
A
= +25°C
T
A
= +125°C
T
A
= +25°C
PV2 = 5V
OUT2 = 2.7V
0.1
0.2
0.3
0.4
0.5
0.6
LOAD CURRENT (A)
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2
LOAD CURRENT (A)
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2
LOAD CURRENT (A)
MAX16922 toc05
MAX16922 toc04
NORMALIZED OUT1 VOLTAGE (%)
1.7
SUPPLY CURRENT (mA)
1.6
1.5
1.4
1.3
1.2
1.1
1.0
NO LOAD
PWM = GND
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
5.15
OUT1 VOLTAGE (V)
5.10
5.05
5.00
4.95
4.90
4.85
I
OUT1
= 1A
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2
I
PV1
(A)
4.80
6
9
12
V
PV1
(V)
15
18
POWER-UP ENABLE TURNING ON
MAX16922 toc07
EN
10V/div
OUT1
5V/div
OUT2
2V/div
OUT3
2V/div
OUT4
1V/div
POWER-UP/DOWN AT
THERMAL SHUTDOWN
MAX16922 toc08
RESET
5V/div
OUT1
5V/div
OUT2
2V/div
OUT3
2V/div
OUT4
1V/div
1ms/div
2ms/div
www.maximintegrated.com
Maxim Integrated
│
5
MAX16922 toc06
1.8
SUPPLY CURRENT vs. TEMPERATURE
2.0
NORMALIZED OUT1 VOLTAGE
vs. LOAD CURRENT
5.20
OUT1 VOLTAGE vs. V
PV1
MAX16922 toc03
100
OUT1 EFFICIENCY vs. LOAD CURRENT
100
OUT1 EFFICIENCY vs. LOAD CURRENT
100
OUT2 EFFICIENCY vs. LOAD CURRENT
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