Step-up Converter. YP6188 Datasheet

YP6188 Converter. Datasheet pdf. Equivalent

YP6188 Datasheet
Recommendation YP6188 Datasheet
Part YP6188
Description 1A Iout DC-DC Step-up Converter
Feature YP6188; YP6188 1A Iout DC-DC Step-up Converter General Description The YP6188 is a high efficiency boost DC.
Manufacture ETC
Datasheet
Download YP6188 Datasheet




ETC YP6188
YP6188 1A Iout DC-DC Step-up Converter
General Description
The YP6188 is a high efficiency boost
DC-DC converter which com bines a current
mode, fixed frequency (1.22MHz or 640KHz
programmable with FSEL pin) PWM architecture
for TFT LCD displays and other portable
applications.
YP6188 operates over a wide range of input
supply voltage(2.5V<VIN<5.5V) and provides a
regulated boost voltage (from VIN up to as
high as 15V). The YP6188 also features a skip
cycle mode operation for power saving at light
loads.
The built-in soft-start circuitry (externally
programm able through the CSS pin) provides the
freedom for the control of input current ramp
rate.Overall current consum ption during the
power down mode (by pull MPD~pin to logic
low) is typically less than 0.1uA.Under-voltage
lockout(UVLO),Thermal Shutdown (TSD),
Over Current detection/protection (OVL) and
other protection featuers are also incorporated
onto the YP6188 to ensure the reliable operation
under different operating circumstances.
Features
90% efficiency
Built-in 2.4A,0.18Ω,20V power NMOS switch
640KHz/1.22MHz FSEL pin selectable fixed frequency
PWM operation
Built-in slope compensation circuitry to ensure system
stability
Adfustable output voltage from VIN up to as high as 15V
Programmable Soft-Start for optimizing control of input
current
ramp rate.
Built-in Skip Cycle mode to maintain high power efficiency at
light loads.
Built-in Thermal Shutdown (TSD) and Over-current
detection/protection(OVI)
Built-in maximum duty cycle detection/protection.
Small 8-pin MSOP Package
Applications
TFT LCD displays
Portable Applications
Handheld Devices
Pin Assignment:
Pin Description
PinNumber PinName
1 COMP
2 FB
3 MPD~
4 GND
5 LX
6 VIN
7 FSEL
Comp 1
FB 2
MPD- 3
VSS 4
MSOP-8
8 CSS
7 FSEL
6 VIN
5 LX
Pin description
Compensation pin for Error Amplifier Connect RC1 and CC1 in series
in-between COMP pin and ground (GND) Optional CC2 between COMP and
GND pins will introduce the extra pole to cancel the un wanted zero due to the
non-ideal ESR of the output capacitor.
Output Voltage Feedback Loop pin.Connect an external preeision resistor
divider (RFB1 and RFB2) tap to FB pin (reference voltage is 1.18V nominal)
Will determine the nomiinal output voltage.i.e,VOUT=1.18*(1+RFB1/RFB2).
Master power down pin (active low).When MPD~pin goes low,the YP6188
Will enter the power down mode.
Ground pin
Boost converter power switch pin.Connect the inductor (L1) and catch
(Schottky)diode (D1) to LX pin with minimum trace area.
Supply voltage input pin (2.5V to 5.5V recommen ded).
Frequency selection pin When this pin is low,640KHz PWM frequency is



ETC YP6188
YP6188 1A Iout DC-DC Step-up Converter
Selected. When this pin is high,the PWM frequency is 1.22MHz.This pin is
Default low (640KHz) with internal 5uA pull down device.
8 CSS Soft-Start current ramp rate control pin. Connect a soft start capscitor (Css)
In-between this pin and ground (GND) to set the proper input current ramp rate.
Typical Application Circuit:
10~47uH
1N5819
Vin LX
H: 1.22MHz FSEL
L: 640KHz
Comp
MPD-
H: Normal
L: Power Down
Cin CSS
10~100uF
Css
102
Vss
FB
RFB1
VFB=1.18V
RFB2
out
100uF
C4
C3 103
Functional Block Diagram.
VSS
Recommended Operating Conditions
VIN Supply Voltage Range
2.5V to 5.5V



ETC YP6188
YP6188
Operating Ambient Temperature (T A)
Output Voltage (VOUT)
1A Iout DC-DC Step-up Converter
-40℃ to 85℃
VIN to 15V maximum
Absolute Maximum Ratings:
VIN
Lx to GND pin
MPD~, FSEL, FB to GND pin
CSS, COMP to GND pin
PMS LX Susceptibility
ESD Susceptibility
Continuous Power Dissipation
Operating Tem perature Range
Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10s)
-0.3V to 5.5V
-0.3V to +20V
-0.3V to (VIN+0.3V)
-0.3V to(VIN +0.3V)
1.2A
2KV (Human Body Model)
200V (Machine Model)
Limited by intemal Thermal Shutdown (TSD)
-40℃ to 85℃
+150
-65to 15085℃
+300
Electrical Characteristics:
Unless otherwise specified, VIN = MPD~ =3.0V, FSEL = GND, TA= 0to 85. Typical values are atTA= 25.
Symbol
Parameter
Conditions
Min Typ Max Units
VIN Input Supply Voltage
2.5 5.5 V
UVLO_H
Under Voltage
VIN rising edge
2.15 2.28 2.42
V
Lockout_ High
threshold
UVLO_L
Under Voltage
VIN falling edge
2.11 2.24 2.32
V
Lockout_ Low
threshold
IQ1_VIN
Quies eent
VFB=1.3V (i.e. with
180 350
µA
Current_ PWM off
PWM switching)
IQ2_VIN
Quies eent
VFB=1.0V (i.e. with
2 5 mA
Current_ OWM on
PWM switching)
IPD_VIN
Power Down Current MPD~pin = GND
0.1 10
µA
VFB
Feedback Voltage
VFB Level in order to
1.162
1.18
1.198
V
Priduce VCOMP=1.18V
IB_FB
FB pin Bias current VFB=1.18V
0 40
nA
Gm
Error Amp (E/A)
I=5µA
70 140 240 µmhos
Trans conductance
AV E/A Voltage Gain
700 V/V
VFB/VIN Feedback Voltage
Line Regulation
Level to produce
VCOMP=1.18V
0.05 0.15 %
(2.5V<VIN<5.5V)
FOSC_L
Oscillator
FSEL=GND
540 640 740 KHz
Frequency_Low
FOSC_H
Oscillator
FSEL=VIN
1.0
1.22 1.5
MHz
Frequency_High
D1_Max
Maximum Duty
FSEL=GND
79 85 92 %
Cycle
D2_Max
Maximum Duty
FSEL=VIN
84 %
Cycle







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