LP3936 Datasheet, PDF (5/30 Pages) National Semiconductor (TI) – Lighting Management System for Six White LEDs and One RGB or FLASH LED

LP3936
www.ti.com
SNVS259D – NOVEMBER 2003 – REVISED MAY 2013
Electrical Characteristics⁽¹⁾⁽²⁾
Limits in standard typeface are for T_J = 25°C. Limits in boldface type apply over the operating ambient temperature range
(−40°C ≤ T_A ≤ +85°C). Unless otherwise noted, specifications apply to the Block Diagram with: V_DD1 = V_DD2 = V_{DD_IO} = 3.6V,
C_VDD1, C_VDD2, C_VDDIO = 1 µF, C_IN, C_OUT = 10 µF, C_VDDA = 1 µF, C_VREF = 0.1 µF, L_BOOST = 10 µH ⁽³⁾.
Symbol
Parameter
Condition
Min
Typ
Max
Units
V_DD1,2
I_DD
Supply Voltage
Standby Supply Current
(V_DD1 and V_DD2 current)
No-Load Supply Current
(V_DD1 and V_DD2 current, boost off)
NSTBY = L (register)
CS, SCL, DI, NRST = H
V_DD1, V_DD2 = 3.6V
NSTBY = H (reg.)
EN_BOOST = L (reg.)
SCL, CS, DI, NRST = H
3.0
3.6
6.0
V
1
7
µA
170
300
µA
Full Load Supply Current
(V_DD1 and V_DD2 current, boost on)
NSTBY = H (register)
NRST, CS, SCL, DI = H
RGB_EN = L
WLED1 … 6 = L
EN_AMBADC = L
1
mA
I_{DD_IO}
V_{DD_IO} Standby Supply Current
NSTBY = L (register)
CS, SCL, DI, NRST = H
1
µA
V_REF
V_{DD_IO} Operating Supply Current
Reference Voltage ⁽⁴⁾
1 MHz Clock Frequency
C_L = 50 pF at DO pin
I_REF ≤ 1 nA,
Test Purposes Only
20
µA
1.205
1.23
1.255
V
−2
+2
%
V_DDA
LDO Output Voltage
IV_DDA < 1 µA
2.688
2.8
2.912
%V
–4
+4
(1) All voltages are with respect to the potential at the GND pins (GND1, GND2, GND_T, GND_BOOST, GND_WLED, GND_RGB).
(2) Min and Max limits are specified by design, test, or statistical analysis. Typical numbers represent the most likely norm.
(3) Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) are used in setting electrical characteristics.
(4) V_REF pin (Bandgap reference output) is for internal use only. A capacitor should always be placed between V_REF and GND1.
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