MAX849 MAXIM [Maxim Integrated Products], MAX849 Datasheet - Page 6

• Manufacturer Part Number: MAX849
• Description: 1-Cell to 3-Cell, High-Power, Low-Noise, Step-Up DC-DC Converters
• Manufacturer: MAXIM [Maxim Integrated Products]

1-Cell to 3-Cell, High-Power,
Low-Noise, Step-Up DC-DC Converters
(T
6
A
A
B
C
A
B
= +25°C, unless otherwise noted.)
_______________________________________________________________________________________
V
A = LX VOLTAGE, 2V/div
B = INDUCTOR CURRENT, 0.5A/div
C = V
V
A = LOAD CURRENT, 0mA TO 200mA, 0.2A/div
B = V
IN
IN
= 1.1V, I
= 1.1V, V
OUT
OUT
HEAVY-LOAD SWITCHING WAVEFORMS
RIPPLE, 50mV/div, AC COUPLED
RIPPLE, 50mV/div, AC COUPLED
OUT
LOAD-TRANSIENT RESPONSE
OUT
= 200mA, V
= 3.3V
(V
OUT
1 s/div
2ms/div
OUT
= 3.3V)
= 3.3V
MAX848/9 TOC-10
MAX848/9 TOC-12
V
0V
0A
200mA
0A
OUT
Typical Operating Characteristics (continued)
A
B
C
A
B
A = V
B = V
C = INPUT CURRENT, 0.2A/div
I
A = V
B = V
OUT
= 0mA, V
IN
OUT
ON1
OUT
, 1.1V TO 2.1V, 1V/div
, 2V/div
, 1V/div
RIPPLE, 50mV/div, AC COUPLED
LINE-TRANSIENT RESPONSE
OUT
= 3.3V
POWER-ON DELAY
(PFM MODE)
5ms/div
5ms/div
MAX848/9 TOC-13
MAX848/9 TOC-11
0V
3.3V
0mA