EC9215 Datasheet, PDF (1/15 Pages) E-CMOS Corporation – Step-up DC/DC Controller

Step-up DC/DC Controller
EC9215
General Description
Features
The EC9215 is a single PWM, step‐ up DC‐ DC controller
with low operating voltage application integrating softstart and
short circuit detection function. The oscillator switching
frequency on chip can be operated by terminating OSC pin to
connect capacitor and resistor for adjustable operating
frequency. Soft‐ start is adjusted with the external capacitor,
which sets the input current ramp. Besides, the external
compensation FB pin will apply the flexibility in the dynamic
loop status, which allows using small and low equivalent
series resistance (ESR) ceramic output capacitors.
The EC9215 is available in a Pb‐ free, SOP‐ 8L and
TSSOP-8L package.
●2.5 to 5.5V Input Voltage Range
●Adjustable Frequency: Maximum 1MHZ
●Incorporates Soft‐ Start Function
●Built‐ in Short‐ Circuit Detection Circuit (SCP)
●Low Operating Current: Maximum to 1mA
●Low Shutdown Current: Maximum to 1µA
●Under‐ Voltage Lockout
●Package: SOP‐ 8 and TSSOP‐ 8
●Lead Free and Green Devices Available (RoHS
Compliant)
Pin Assignments
Applications
●LCD Display Power Source
●PDA, PMP, MP3
●Digital Camera
Pin Description
Figure1 Pin Configuration of EC9215(Top View)
Pin Number
1
2
3
4
5
6
7
8
Pin Name
INV
SCP
VDD
CTL
OUT
GND
OSC
FB
Description
Internal 0.5V reference voltage. Use a resistor divider to set the output voltage
Soft‐ start and short‐ circuit detection, connects a capacitor from the pin to ground.
Power supply input pin for IC voltage
Output control pin. Low = operating mode; High = shutdown mode.
External MOSFET driving pin.
GND
Setting capacitor and resister to provide oscillation switching frequency adjustment.
Error amplifier output pin. Setting circuit for IC compensation.
E-CMOS Corp. (www.ecmos.com.tw)
Page 1 of 15
5J15N-Rev.F001