SMB110 datasheet(12/34 Pages) SUMMIT

12 / 34 page

SMB110

Preliminary Information

Summit Microelectronics, Inc

2099 2.3 3/1/2005

DC OPERATING CHARACTERISTICS (CONTINUED)

(Over recommended operating conditions, unless otherwise noted. All voltages are relative to GND.)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Inverting Output Block Channel 0 (Continued)

IREF_OUT

VREF_OUT source current

VREF_OUT = 1.5V

100

µA

Minimum load

L=33uF, VO=-7.5V,

VIN=4.2V, VD=0.3V

10.1

kΩ

Boost Output Block Channel 1

VOUT

Programmable voltage set point

range

VBATT=4.2V, ILOAD=0

4.5

∆VOUT

Output accuracy

Excluding external resistor

divider accuracy

0.5

Output high

RDRVH

HSDRV ON resistance

Output low

Ω

High

D.C.

Duty Cycle

Low

VCOMP1

Feedback voltage reference

COMP1 pin

Programmable in 4mV steps

1.0

∆VCOMP1

Feedback voltage reference

accuracy

COMP1 pin

-0.5

+0.5

Minimum load

L=33uF, VO=12V, VIN=4.2V,

VD=0.3V

kΩ

IPCHSEQ

PCHSEQ sink current

100

µA

ENTH

Enable threshold

Voltage on PCHSEQ pin

when LSDRV output is

enabled

200

Buck Output Block Channels 2 and 3

VBATT = 4.2V, ILOAD = 0

0.5

3.8

VOUT

Voltage nominal set point range

VBATT = 6.0V, ILOAD = 0

0.6

5.4

∆VOUT

Output accuracy

Including internal resistor

divider

0.5

Output high

RDRVH

HSDRV ON resistance

Output low

Ω

Output high

RDRVL

LSDRV ON resistance

Output low

VCOMP1

Feedback voltage reference

COMP1 pin

Programmable in 4mV steps

1.0

∆VCOMP1

Feedback voltage reference

accuracy

COMP1 pin

-0.5

+0.5

High

D.C.

Duty Cycle

Low

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