MIC2186

Features:

• Input voltage range: 2.9V to 14V
• 1.6 output driver
• Oscillator frequency of 100kHz/200kHz/400kHz
• Frequency sync to 600kHz
• Front edge blanking
• PWM Current Mode Control
• Selectable light load SKIP mode
• 600A quiescent current (SKIP-Mode)
• 0.5A shutdown current
• Cycle-by-Cycle current limiting
• Frequency foldback protection
• Adjustable under-voltage lockout
• Precision 1.245V reference output
• 16 pin SOIC and QSOP package options
• Selectable 50% maximum duty cycle for flyback applications




Application

• DC power distribution systems
• Wireless Modems
• ADSL line cards
• SLIC power supplies
• 1-and 2-cell Li Ion battery operated equipment




Pinout






Specifications

Supply Voltage (V_INA, V_INP) ...................................15V
Digital Supply Voltage (V_DD) ....................................7V
SKIP Pin Voltage (V_SKIP) .......................... 0.3V to 7V
Max Duty Cycle Pin Voltage (V_HIDC) ......... 0.3V to 7V
Frequency Divider Pin Voltage (V_FREQ/2).. 0.3V to 7V
Sync Pin Voltage (V_SYNC) ......................... 0.3V to 7V
Comp Pin Voltage (V_COMP) ...................... 0.3V to 3V
Feedback Pin Voltage (V_FB) ..................... 0.3V to 3V
Enable Pin Voltage (V_EN/UVLO) ............. 0.3V to 15V
Current Sense Voltage (V_CSH) ................ 0.3V to 1V
Power Dissipation (P_D)
16 lead SOP ......................... 400mW @ T_A = 85°C
16 lead QSOP ...................... 245mW @ T_A = 85°C
Ambient Storage Temp ................ 65°C to +150°C




Description

Micrel's MIC2186 is a high efficiency boost PWM control IC. With its wide input voltage range of 2.9V to 14V, it can be used to efficiently boost voltages in 1- or 2-cell Li Ion battery powered applications, as well as to boost voltages in fixed 3.3V, 5V, or 12V systems. Its powerful 1.6 output driver allows the MIC2186 to supply large output currents with the selection of proper external MOSFETs.

The MIC2186 can be configured to operate at 100kHz, 200kHz, or 400kHz. With it's fixed frequency PWM architecture, and easily synchronized drive, the MIC2186 is ideal for noise-sensitive telecommunications applications.

MIC2186 also features a low current shutdown mode of 0.5A and programmable undervoltage lockout. A manually selectable SKIP Mode allows high efficiencies in light load situations.

The MIC2186 is available in 16 pin SOIC and QSOP package options with an operating range from 40°C to 125°C.