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PDF MIC45404 Data sheet ( Hoja de datos )
| Número de pieza | MIC45404 | |
| Descripción | 19V 5A Ultra-Low Profile DC-to-DC Power Module | |
| Fabricantes | Microchip | |
| Logotipo |  |
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MIC45404
19V 5A Ultra-Low Profile DC-to-DC Power Module
Features
• Input Voltage Range: 4.5V to 19V
• Output Current: Up to 5A
• 82% Peak Efficiency at 12 VIN, 0.9 VOUT
• Pin-Selectable Output Voltages: 0.7V, 0.8V, 0.9V,
1.0V, 1.2V, 1.5V, 1.8V, 2.5V, 3.3V
• ±1% Output Voltage Accuracy
• Supports Safe Pre-Biased Start-up
• Pin-Selectable Current Limit
• Pin-Selectable Switching Frequency
• Internal Soft Start
• Thermal Shutdown
• Hiccup Mode Short-Circuit Protection
• Available in a 54-Lead 6 mm x 10 mm QFN
Package
• Ultra-Low Profile: 2.0 mm Height
• -40°C to +125°C Junction Temperature Range
Applications
• Servers, Data Storage, Routers and Base Stations
• FPGAs, DSP and Low-Voltage ASIC Power
General Description
The MIC45404 device is an ultra-low profile, synchro-
nous step-down regulator module, featuring a unique
2.0 mm height. The module incorporates a DC-to-DC
regulator, bootstrap capacitor, high-frequency input
capacitor and an inductor in a single package. The
module pinout is optimized to simplify the Printed
Circuit Board (PCB) layout process.
This highly integrated solution expedites system
design and improves product time to market. The inter-
nal MOSFETs and inductor are optimized to achieve
high efficiency at low output voltage. Due to the fully
optimized design, MIC45404 can deliver up to 5A
current with a wide input voltage range of 4.5V to 19V.
The MIC45404 is available in a 54-lead 6 mm x
10 mm x 2.0 mm QFN package with a junction operat-
ing temperature range from -40C to +125C, which
makes an excellent solution for systems in which PCB
real-estate and height are important limiting factors,
and air flow is restricted.
Typical Application
VDDA
VIN
4.5V to 19V
VDDA
Frequency
Selection
VDDA
Current Limit
Selection
Power-Good
Enable
VIN VDDA
GND
GND
OUT
OUTSNS
COMP
FREQ
MIC45404
VOSET1
ILIM
PG
VOSET0
EN/DLY
VOUT
VDDA
Output
Voltage
VDDA Selection
MIC45404 12V 5A DC-to-DC Converter
2015 Microchip Technology Inc.
DS20005478A-page 1
1 page  
MIC45404
ELECTRICAL CHARACTERISTICS(1) (CONTINUED)
Electrical Specifications: unless otherwise specified, VIN = 12V; CVDDA= 2.2 µF, TA = +25°C.
Boldface values indicate -40°C TJ +125°C.
Parameter
Symbol Min.
Typ.
Max. Units
Test Conditions
Pulse-Width Modulation (PWM)
Minimum LX On Time
Minimum LX Off time
TON(MIN)
TOFF(MIN)
—
90
Minimum Duty Cycle
Gm Error Amplifier
Error Amplifier
Transconductance
Error Amplifier DC Gain
Error Amplifier Source/Sink
Current
COMP Output Swing High
COMP Output Swing Low
COMP-to-Inductor Current
Transconductance
Output Voltage DC Accuracy
Output Voltage Accuracy for
Ranges 1 and 2
DMIN
GmEA
AEA
ISR_SNK
COMP_H
COMP_L
GmPS
OutErr12
—
—
—
-400
—
—
—
-1
Output Voltage Accuracy for
Range 3
OutErr3
-1.5
Load Regulation
Line Regulation
LoadReg
LineReg
—
—
Internal Soft Start
Reference Soft Start
Slew Rate
SS_SR
—
Power Good (PG)
PG Low Voltage
PG Leakage Current
PG Rise Threshold
PG_VOL
PG_ILEAK
PG_R
—
-1
90
PG Fall Threshold
PG_F
87.5
PG Rise Delay
PG_R_DLY —
PG Fall Delay
PG_F_DLY —
Note 1: Specification for packaged product only.
26
135
0
1.4
50000
—
2.5
0.8
12.5
—
—
0.03
0.01
0.42
0.17
0.02
92
90
0.45
80
—
190
—
—
—
+400
—
—
—
ns TA = TJ = +25°C
ns VIN = VDDA = 5V, OUTSNS = 3V,
FREQ = Open (400 kHz setting),
VOSET0 = VOSET1 = 0V
(3.3V setting),
TA = TJ = +25°C
% OUTSNS > 1.1 x VOUT(NOM)
mS
V/V
µA TA = TJ = +25°C
V
V
A/V VOUT = 1.2V, IOUT = 4A
1 % 4.75V VIN 19V,
VOUT = 0.7V to 1.8V,
TA = TJ = -40°C to +125°C,
IOUT = 0A
1.5 % 4.75V VIN 19V,
VOUT = 2.49V to 3.3V,
TA = TJ = -40°C to +125°C,
IOUT = 0A
— % IOUT = 0A to 5A
— % 6V < VIN < 19V, IOUT = 2A
— V/ms VOUT = 0.7V, 0.8V, 0.9V,
1.0V, 1.2V
0.4
1
95
92.5
—
—
V IPG = 4 mA
µA PG = 5V
% VOUT Rising
% VOUT Falling
ms VOUT Rising
µs VOUT Falling
2015 Microchip Technology Inc.
DS20005478A-page 5
5 Page 
MIC45404
Note: Unless otherwise indicated, VIN = 12V; CVDDA= 2.2 µF, TA = +25°C.
VIN(5V/div)
IOUT(5A/div)
VOUT (500 mV/div)
PG(5V/div)
Time (1 ms/div)
PG(5V/div)
VOUT (500 mV/div)
Time (1 ms/div)
VIN = 12V
VOUT = 1.2V
fSW = 400 kHz
ILIM = high Z
IOUT(2A/div)
FIGURE 2-24:
Power-up into Short Circuit.
FIGURE 2-27:
(ILIM = High Z).
Output Current Limit
EN/DLY(2V/div
IOUT(5A/div)
VOUT (500 mV/div)
PG(5V/div)
Time (1 ms/div)
FIGURE 2-25:
Enable into Short Circuit.
PG(5V/div)
VOUT (500 mV/div)
VIN = 12V
VOUT = 1.2V
fSW = 400 kHz
ILIM = 0V
Time (1 ms/div)
IOUT(2A/div)
FIGURE 2-26:
(ILIM = 0V).
Output Current Limit
PG(5V/div)
VOUT (500 mV/div)
IOUT(2A/div)
Time (20 ms/div)
FIGURE 2-28:
Hiccup Mode Short Circuit
and Output Recovery.
PG(5V/div)
VOUT (500 mV/div)
IOUT(2A/div)
Time (200 ms/div)
FIGURE 2-29:
Thermal Shutdown and
Thermal Recovery.
2015 Microchip Technology Inc.
DS20005478A-page 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MIC45404.PDF ] | |
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