Rainbow Electronics MAX1802 - Manual (Page 3)

MAX1802
Digital Camera Step-Down
Power Supply
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V VDDM = 6V, V VDDC = 3V, PGNDM = PGND = GND, DCON1 = REF, V ONM = 3V, V ONC = V ON1 = V DCON2 =
V DCON3 = 0, T A = 0°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
REFERENCE
Reference Output Voltage V REF I REF = 20 µA 1.235 1.248 1.260 V
REF Load Regulation 10 µA < I
REF < 200 µA 5 9 mV
REF Line Rejection 2.7V < V OUT < 5.5V 1 5 mV
REF Undervoltage Lockout
Threshold
REF rising, 20mV hysteresis 0.9 1 1.1 V
OSCILLATOR
OSC Discharge Trip Level OSC rising 1.225 1.250 1.275 V
OSC Input Bias Current V
OSC
= 1.1V 0.2 100 nA
OSC Discharge Resistance V OSC = 1.5V 30 100 Ω
OSC Discharge Pulse Width 100 ns
LOGIC INPUTS (ONM, ONC, ON1)
Input Low Level V IL 0.4 V
ONM 1.8
Input High Level V IH
ONC, ON1 1.6
V
Input Leakage Current
ONM: V IN = 0 or 11V;
ONC, ON1: V IN = 0 or 5V
0.01 1 µA
MAIN DC-DC CONVERTER
Main Output Voltage Adjust
Range
V OUT 2.7 5.5 V
Main Idle Mode™ Threshold
V OSC = 0.625V, measured between VDDM
and LXM
8 20 32 mV
Main Current-Sense Amplifier
Voltage Gain
A VCSM Measured between VDDM and LXM 8.4 9.3 10.2 V/V
Main N Channel Turn-Off
Threshold
Measured between LXM and PGNDM -26 -17 -8 mV
Main Slope Compensation
Gain
A VSWM 0.16 0.20 0.24 V/V
MAIN ERROR AMPLIFIER
FBM Regulation Voltage Unity gain configuration, FBM = COMPM 1.233 1.248 1.263 V
FBM to COMPM
Transconductance
G EA
Unity gain configuration, FBM = COMPM,
-5
µA < I
LOAD < 5 µA
70 100 160 µS
FBM Input Leakage Current V FBM = 1.35V 5 100 nA
COMPM Minimum Output
Voltage
V FBM = 1.35V, COMPM open 0.3 V
COMPM Maximum Output
Voltage
V COMPM (MAX) V FBM = 1.15V, COMPM open 2.00 2.14 2.27 V
Idle Mode is a trademark of Maxim Integrated Products.