ELM600LA 800mA 1.4MHz
high efficiency synchronous PWM step down DC/DC converter
(Adjustable output voltage)
■Test circuits
L=2.2µH
Vout
RL
VIN
SW
ELM600LA
GND
Cout=
22µF
R1
R2
Vin
FB
EN
Cin=10µF
(Fixed output voltage)
■Electrical characteristics
Vin=3.6V, Typical values are at Top=25°C, unless otherwise noted.
Vout=1.2V
Parameter
Symbol
Vin
Test condition
Min.
2.5
-30.0
Typ.
Max. Unit
Supply voltage
Feedback current
Regulated feedback voltage
6.0
V
nA
V
Ifb
30.0
Vfb -40°C ≤ Top ≤ +85°C
0.582 0.600 0.618
Reference voltage line regulation ∆Vfb/∆Vin Vin=2.5V to 6V
Output voltage line regulation ∆Vout/∆Vin Vin=2.5V to 6V
0.04
0.04
0.5
0.40 %/V
0.40 %/V
%
Output voltage load regulation
Output range (Fixed voltage)
Shutdown current
Vlr
Vout Vin=2.5V to 6V
Is
1.164 1.200 1.236
V
Ven=0V, Vin=6V
0.01
200
1.00
µA
µA
Quiescent current
Iq
Ven=Vin,Vfb=0.65V, No switching
Ven=0V, Vfb=0.65V
Vsw=0V or 6V
SW leakage current
Ileak
-1
1
µA
PMOSFET on resistance
NMOSFET on resistance
RdsonP Isw=100mA
RdsonN Isw=-100mA
0.35
0.24
Ω
Ω
Duty cycle=100%
Current pulse width < 1ms
PMOSFET current limit
IPcl
0.8
1.1
1.5
A
Oscillator frequency
Fosc
Tsd
1.12
1.40
145
1.68 MHz
Thermal shutdown threshold
EN high level input voltage
EN low level input voltage
EN input current
°C
V
Venh -40°C ≤ Top ≤ +85°C
Venl -40°C ≤ Top ≤ +85°C
Ien
1.1
-1
0.3
1
V
µA
Ven=0V to Vin
Rev.1.1
10 - 4
ELM-TECH [ ELM Technology Corporation ]
