EV1531DQ-002A – LOW PWR, TRI-OUTPUT STEP-UP + CHARGE PUMP FOR TFT BIAS
EVALUATION BOARD – INITIAL RELEASE
TEST RESULTS
Power-Up Sequencing
V
= 3.3V, V
= 5V, I = 100mA,
Load Transient
IN
MAIN
MAIN
Efficiency vs Load Current
V
= 3.3V, V
= 5V, 5mA-50mA STEP
V
= 15V, I = 5mA, V = -10V, I = 5mA,
GH GL GL
GH
=10nF
IN
MAIN
C
V
= 15V, I = 5mA, V = -10V, I = 5mA
GH GL GL
Delivered by Step-Up Converter
CT
GH
100
90
80
70
60
50
40
30
20
V
= 4.2V
IN
V
= 3.3V
IN
V
V
EN
MAIN
5V/div
50mV/div
V
MAIN
5V/div
V
GH
10V/div
I
V
MAIN
GL
50mA/div
10V/div
V
= 5V
MAIN
0
100 200 300 400 500 600
10ms/div
MP1531_WF01
MP1531_WF02
LOAD CURRENT (mA)
MP1531-TPC01
QUICK START GUIDE
The three output voltages of this board are set to +5V, +15V, and -10V. The board layout
accommodates most commonly used inductors and output capacitors.
1. Make sure Jumper JP1 is connected between 2 and 3.
2. Attach positive end of loads to VMAIN, VGH,and VGL pins respectively. Attach negative end of
loads to GND pins.
3. Attach input voltage 2.7V ≤ VIN ≤ 5.5V and input ground to VIN and GND pins respectively.
4. During startup RDY will be left HIGH. Once the turn-on sequence is complete, this pin will be
pulled low if all regulators exceed 80% of their specified voltages. After all regulators are turned
on, a fault in any regulator will cause RDY to go LOW after approximately 15µs. If the fault
persists for more than approximately 6ms (for CCT = 10nF), the entire chip will shut down.
NOTICE: MPS believes the information in this document to be accurate and reliable. However, it is subject to change without
notice. Contact MPS for current specifications. MPS encourages users of its products to ensure that third party Intellectual
Property rights are not infringed upon when integrating MPS products into any application. MPS cannot assume any legal
responsibility for any said applications.
EV1531DQ-002A Rev. 1.1
10/13/04
© 2004 MPS, Inc.
Monolithic Power Systems, Inc.
983 University Avenue, Building A, Los Gatos, CA 95032 USA
Tel: 408-357-6600 ♦ Fax: 408-357-6601 ♦ www.MonolithicPower.com
5
MPS [ MONOLITHIC POWER SYSTEMS ]
