|
|
PDF MIC24051 Data sheet ( Hoja de datos )
| Número de pieza | MIC24051 | |
| Descripción | High-Efficiency Buck Regulator | |
| Fabricantes | Microchip | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MIC24051 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
MIC24051
12V, 6A High-Efficiency Buck Regulator
with Hyper Speed Control®
Features
• Hyper Speed Control® Architecture Enables:
- High Delta V Operation (VIN = 19V and VOUT
= 0.8V)
- Small Output Capacitance
• 4.5V to 19V Voltage Input
• 6A Output Current Capability, up to 95%
Efficiency
• Adjustable Output from 0.8V to 5.5V
• ±1% Feedback Accuracy
• Any Capacitor Stable - Zero-to-High ESR
• 600 kHz Switching Frequency
• No External Compensation
• Power Good (PG) Output
• Foldback Current-Limit and “Hiccup Mode”
Short-Circuit Protection
• Supports Safe Start-Up into a Pre-Biased Load
• –40°C to +125°C Junction Temperature Range
• Available in a 28-pin 5 mm x 6 mm QFN Package
Applications
• Servers and Workstations
• Routers, Switches, and Telecom Equipment
• Base Stations
General Description
The MIC24051 is a constant-frequency, synchronous
buck regulator featuring a unique adaptive on-time
control architecture. The MIC24051 operates over an
input supply range of 4.5V to 19V and provides a
regulated output of up to 6A of output current. The
output voltage is adjustable down to 0.8V with a
guaranteed accuracy of ±1%, and the device operates
at a switching frequency of 600 kHz.
Microchip’s Hyper Speed Control® architecture allows
for ultra-fast transient response while reducing the
output capacitance and also makes (High VIN)/(Low
VOUT) operation possible. This adaptive tON ripple
control architecture combines the advantages of
fixed-frequency operation and fast transient response
in a single device.
The MIC24051 offers a full suite of protection features
to ensure protection of the IC during fault conditions.
These include undervoltage lockout to ensure proper
operation under power-sag conditions, internal
soft-start to reduce inrush current, foldback current
limit, “hiccup mode” short-circuit protection and thermal
shutdown. An open-drain Power Good (PG) pin is
provided.
The 6A HyperLight Load® part, MIC24052, is also
available on Microchip’s web site.
Typical Application Schematic
MIC24051
28-PIN QFN
2.2μF
10k
PG
VIN
4.5V TO 19V
4.7μF
x2
10k
EN
MIC24051
VDD
PVDD
SGND
BST
PG
VIN
PVIN
SW
CS
PGND
FB
EN
0.1μF
2.2μH
0.1μF
19.6k
4.7nF
2.49k
2.00k
VOUT
1.8V/6A
100μF
2016 Microchip Technology Inc.
DS20005658A-page 1
1 page  
MIC24051
TABLE 1-1: ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Characteristics: PVIN = VIN = VEN = 12V, VBST – VSW = 5V; TA = 25°C, unless noted. Bold values
indicate –40°C ≤ TJ ≤ +125°C. (Note 1).
Parameters
Sym. Min. Typ. Max. Units
Conditions
Top MOSFET RDS(ON)
Bottom MOSFET RDS(ON)
SW Leakage Current
VIN Leakage Current
Power Good (PG)
PG Threshold Voltage
PG Hysteresis
PG Delay Time
PG Low Voltage
Thermal Protection
Overtemperature Shutdown
Overtemperature Shutdown
Hysteresis
— — 42 — mΩ
— — 12.5 — mΩ
— — — 60 µA
— — — 25 µA
ISW = 1A
ISW = 1A
VEN = 0V
VEN = 0V
— 85 92 95 %VOUT Sweep VFB from Low to High
— — 5.5 — %VOUT Sweep VFB from High to Low
—
— 100 —
µs Sweep VFB from Low to High
—
—
70
200 mV
Sweep VFB < 0.9 x VNOM,
IPG = 1 mA
—
— 160 —
°C
— — 15 — °C
TJ Rising
—
Note 1:
2:
3:
Specification for packaged product only.
Measured in test mode.
The maximum duty-cycle is limited by the fixed mandatory off-time (tOFF) of typically 300 ns.
2016 Microchip Technology Inc.
DS20005658A-page 5
5 Page 
MIC24051
FIGURE 2-25:
Output Current.
Efficiency (VIN = 5V) vs.
FIGURE 2-28:
Output Current.
Efficiency (VIN = 12V) vs.
FIGURE 2-26:
IC Power Dissipation (VIN =
5V) vs. Output Current.
FIGURE 2-29:
IC Power Dissipation (VIN =
12V) vs. Output Current.
FIGURE 2-27:
Die Temperature (VIN = 5V)
vs. Output Current (Note 1).
FIGURE 2-30:
Die Temperature (VIN =
12V) vs. Output Current (Note 1).
2016 Microchip Technology Inc.
DS20005658A-page 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MIC24051.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MIC24051 | High-Efficiency Buck Regulator | Microchip |
| MIC24051 | 6A High-Efficiency Buck Regulator |  Micrel Semiconductor |
| MIC24052 | High-Efficiency Buck Regulator | Microchip |
| MIC24052 | 6A High-Efficiency Buck Regulator | Micrel Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |